Add a Quick Flag to an unopened message

`Insert`

All hotkeys for Microsoft Outlook 2016 (Windows)

Basic Navigation Switch to Mail	`Ctrl` + `1`
Basic Navigation Switch to Calendar	`Ctrl` + `2`
Basic Navigation Switch to Contacts	`Ctrl` + `3`
Basic Navigation Switch to Tasks	`Ctrl` + `4`
Basic Navigation Switch to Notes	`Ctrl` + `5`
Basic Navigation Switch to Folder List in Navigation Pane	`Ctrl` + `6`
Basic Navigation Switch to Shortcuts	`Ctrl` + `7`
Basic Navigation Switch to next/previous message (with message open)	`Ctrl` + `Period` / `Ctrl` + `Comma`
Basic Navigation Move between the Folder Pane, main Outlook window, Reading Pane, and To-Do Bar	`Ctrl` + `Shift` + `Tab` or `Shift` + `Tab`
Basic Navigation Move between the Outlook window, the smaller panes in the Folder Pane, the Reading Pane, and the sections in the To-Do Bar	`Tab`
Basic Navigation Move between the Outlook window, the smaller panes in the Folder Pane, the Reading Pane, and the sections in the To-Do Bar, and the menu access keys in the Outlook ribbon	`F6`
Basic Navigation Move around message header lines in the Folder Pane or an open message	`Ctrl` + `Tab`
Basic Navigation Move around within the Folder Pane	`Arrow Keys`
Basic Navigation Go to a different folder	`Ctrl` + `Y`
Basic Navigation Go to the Search box	`Ctrl` + `E` or `F3`
Basic Navigation In the Reading Pane, go to the previous message	`Alt` + `Arrow Up` or `Ctrl` + `,` or `Alt` + `Page Up`
Basic Navigation In the Reading Pane, page down/up through text	`Space` / `Shift` + `Space`
Basic Navigation Collapse or expand a group in the email message list, respectively	`Arrow Left` `Arrow Right`
Basic Navigation Go back to previous view in main Outlook window	`Alt` +B or `Alt` + `Arrow Left`
Basic Navigation Go forward to next view in main Outlook window	`Alt` +Arrow Right
Basic Navigation Select the InfoBar and, if available, show the menu of commands	`Ctrl` + `Shift` + `W`
Search Find a message or other item	`Ctrl` + `E`
Search Clear the search results	`Esc`
Search Expand the search to include All Mail Items, All Calendar Items, or All Contact Items, depending on the selected Outlook function	`Ctrl` + `Alt` + `A`
Search Use Advanced Find	`Ctrl` + `Shift` + `F`
Search Create a Search Folder	`Ctrl` + `Shift` + `P`
Search Search for text within an open item	`F4`
Search Find and replace text, symbols, or some formatting commands. Works in the Reading Pane on an open item	`Ctrl` + `H`
Search Expand search to include items from the current folder	`Ctrl` + `Alt` + `K`
Search Expand search to include subfolders	`Ctrl` + `Alt` + `Z`
Common Commands: Common To Most Views Save (except in Tasks)	`Ctrl` + `S` or `Shift` + `F12`
Common Commands: Common To Most Views Save and close (except in Mail)	`Alt` + `S`
Common Commands: Common To Most Views Save as (only in Mail)	`F12`
Common Commands: Common To Most Views Undo	`Ctrl` + `Z` or `Alt` + `Backspace`
Common Commands: Common To Most Views Delete an item	`Ctrl` + `D`
Common Commands: Common To Most Views Print	`Ctrl` + `P`
Common Commands: Common To Most Views Copy an item	`Ctrl` + `Shift` + `Y`
Common Commands: Common To Most Views Move an item	`Ctrl` + `Shift` + `V`
Common Commands: Common To Most Views Check names	`Ctrl` + `K`
Common Commands: Common To Most Views Check spelling	`F7`
Common Commands: Common To Most Views Flag for follow-up	`Ctrl` + `Shift` + `G`
Common Commands: Common To Most Views Forward	`Ctrl` + `F`
Common Commands: Common To Most Views Send or post or invite all	`Alt` + `S`
Common Commands: Common To Most Views Enable editing in a field (except in Mail or Icon view)	`F2`
Common Commands: Common To Most Views Left align text	`Ctrl` + `L`
Common Commands: Common To Most Views Center text	`Ctrl` + `E`
Common Commands: Common To Most Views Right align text	`Ctrl` + `R`
Common Commands: Format Text and work with Editor Cut (selected text)	`Ctrl` + `X` or `Shift` + `Delete`
Common Commands: Format Text and work with Editor Copy (selected text), NOTE: Ctrl+Insert is not available in the Reading Pane	`Ctrl` + `C` or `Ctrl` + `Insert`
Common Commands: Format Text and work with Editor Paste (from clipboard)	`Ctrl` + `V` or `Shift` + `Insert`
Common Commands: Format Text and work with Editor Bold	`Ctrl` + `B`
Common Commands: Format Text and work with Editor Underline	`Ctrl` + `U`
Common Commands: Format Text and work with Editor Italics	`Ctrl` + `I`
Common Commands: Format Text and work with Editor Increase font size	`Ctrl` + `]` or `Ctrl` + `Shift` + `>`
Common Commands: Format Text and work with Editor Decrease font size	`Ctrl` + `[` or `Ctrl` + `Shift` + `<`
Common Commands: Format Text and work with Editor Switch case (selected text)	`Shift` + `F3`
Common Commands: Format Text and work with Editor Format letters as small capitals	`Ctrl` + `Shift` + `K`
Common Commands: Format Text and work with Editor Display the Format menu	`Alt` + `O`
Common Commands: Format Text and work with Editor Display the Font dialog box	`Ctrl` + `Shift` + `P`
Common Commands: Format Text and work with Editor Add bullets	`Ctrl` + `Shift` + `L`
Common Commands: Format Text and work with Editor Increase Decrease indent	`Ctrl` + `T` / `Ctrl` + `Shift` + `T`
Common Commands: Format Text and work with Editor Left align	`Ctrl` + `L`
Common Commands: Format Text and work with Editor Center	`Ctrl` + `E`
Common Commands: Format Text and work with Editor Clear formatting	`Ctrl` + `Shift` + `Z` or `Ctrl` + `Space`
Common Commands: Format Text and work with Editor Delete the next word	`Ctrl` + `Shift` + `H`
Common Commands: Format Text and work with Editor Stretch a paragraph to fit between the margins	`Ctrl` + `Shift` + `J`
Common Commands: Format Text and work with Editor Apply styles	`Ctrl` + `Shift` + `S`
Common Commands: Format Text and work with Editor Create/reduce a hanging indent	`Ctrl` + `T` / `Ctrl` + `Shift` + `T`
Common Commands: Format Text and work with Editor Insert a hyperlink	`Ctrl` + `K`
Common Commands: Format Text and work with Editor Left/Right align a paragraph	`Ctrl` + `L` / `Ctrl` + `R`
Common Commands: Format Text and work with Editor Remove paragraph formatting	`Ctrl` + `Q`
Common Commands: Format Text and work with Editor Toggle show/hide formatting marks. Must be in email body for this to work.	`Ctrl` + `Shift` + `8`
Common Commands: Add Links and Edit URLs Edit a URL in the body of an item	`Ctrl` + `Left Mouse Click`
Common Commands: Add Links and Edit URLs Insert hyperlink	`Ctrl` + `K`
Common Commands: Create Item or File Create an appointment	`Ctrl` + `Shift` + `A`
Common Commands: Create Item or File Create a contact	`Ctrl` + `Shift` + `C`
Common Commands: Create Item or File Create a contact group	`Ctrl` + `Shift` + `L`
Common Commands: Create Item or File Create a fax	`Ctrl` + `Shift` + `X`
Common Commands: Create Item or File Create a folder	`Ctrl` + `Shift` + `E`
Common Commands: Create Item or File Create a meeting request	`Ctrl` + `Shift` + `Q`
Common Commands: Create Item or File Create a message	`Ctrl` + `Shift` + `M`
Common Commands: Create Item or File Create a note	`Ctrl` + `Shift` + `N`
Common Commands: Create Item or File Create a Microsoft Office document	`Ctrl` + `Shift` + `H`
Common Commands: Create Item or File Post to this folder	`Ctrl` + `Shift` + `S`
Common Commands: Create Item or File Post a reply in this folder	`Ctrl` + `T`
Common Commands: Create Item or File Create a Search Folder	`Ctrl` + `Shift` + `P`
Common Commands: Create Item or File Create a task	`Ctrl` + `Shift` + `K`
Common Commands: Create Item or File Create a task request	`Ctrl` + `Shift` + `U`
Common Commands: Color Categories Delete the selected category from the list in the Color Categories dialog box	`Alt` + `D`
Common Commands: Flags Open the Flag for Follow Up dialog box to assign a flag	`Ctrl` + `Shift` + `G`
Mail Switch to Inbox	`Ctrl` + `Shift` + `I`
Mail Pop Out email reply in new window	`Ctrl` + `O`
Mail Switch to Outbox	`Ctrl` + `Shift` + `O`
Mail Choose the account from which to send a message	`Alt` + `M`
Mail Check names	`Ctrl` + `K`
Mail Send	`Alt` + `S`
Mail Reply to a message	`Ctrl` + `R`
Mail Reply all to a message	`Ctrl` + `Shift` + `R`
Mail Reply with meeting request	`Ctrl` + `Alt` + `R`
Mail Forward a message	`Ctrl` + `F`
Mail Mark a message as not junk	`Ctrl` + `Alt` + `J`
Mail Display blocked external content (in a message)	`Ctrl` + `Shift` + `I`
Mail Post to a folder	`Ctrl` + `Shift` + `S`
Mail Apply Normal style	`Ctrl` + `Shift` + `N`
Mail Check for new messages	`Ctrl` + `M` or `F9`
Mail Go to the previous message	`Arrow Up`
Mail Go to the next message	`Arrow Down`
Mail Create a message (when in Mail)	`Ctrl` + `N`
Mail Create a message (from any Outlook view)	`Ctrl` + `Shift` + `M`
Mail Open a received message	`Ctrl` + `O`
Mail Delete and Ignore a Conversation	`Ctrl` + `Shift` + `D`
Mail Open the Address Book	`Ctrl` + `Shift` + `B`
Mail Add a Quick Flag to an unopened message	`Insert`
Mail Display the Flag for Follow Up dialog box	`Ctrl` + `Shift` + `G`
Mail Mark as read/unread	`Ctrl` + `Q` / `Ctrl` + `U`
Mail Open the Mail Tip in the selected message	`Ctrl` + `Shift` + `W`
Mail Find or replace	`F4`
Mail Find next	`Shift` + `F4`
Mail Send	`Ctrl` + `Enter`
Mail Print	`Ctrl` + `P`
Mail Forward	`Ctrl` + `F`
Mail Forward as attachment	`Ctrl` + `Alt` + `F`
Mail Show the properties for the selected item	`Alt` + `Enter`
Mail Create a multimedia message	`Ctrl` + `Shift` + `U`
Mail Mark for Download	`Ctrl` + `Alt` + `M`
Mail Clear Mark for Download	`Ctrl` + `Alt` + `U`
Mail Display Send/Receive progress	`Ctrl` + `B`
Calendar Create an appointment (when in Calendar)	`Ctrl` + `N`
Calendar Create an appointment (in any Outlook view)	`Ctrl` + `Shift` + `A`
Calendar Create a meeting request	`Ctrl` + `Shift` + `Q`
Calendar Forward an appointment or meeting	`Ctrl` + `F`
Calendar Reply to a meeting request with a message	`Ctrl` + `R`
Calendar Reply All to a meeting request with a message	`Ctrl` + `Shift` + `R`
Calendar Show 1 day in the calendar	`Alt` + `1`
Calendar Show 2 days in the calendar	`Alt` + `2`
Calendar Show 3 days in the calendar	`Alt` + `3`
Calendar Show 4 days in the calendar	`Alt` + `3`
Calendar Show 5 days in the calendar	`Alt` + `5`
Calendar Show 6 days in the calendar	`Alt` + `6`
Calendar Show 7 days in the calendar	`Alt` + `7`
Calendar Show 8days in the calendar	`Alt` + `8`
Calendar Show 9 days in the calendar	`Alt` + `9`
Calendar Show 10 days in the calendar	`Alt` + `0`
Calendar Go to a date	`Ctrl` + `G`
Calendar Switch to Month view	`Alt` + `=` or `Ctrl` + `Alt` + `4`
Calendar Go to the next/previous day	`Ctrl` + `Arrow Right` / `Ctrl` + `Arrow Left`
Calendar Go to the next/previous week	`Alt` + `Arrow Down` / `Alt` + `Arrow Up`
Calendar Go to the next/previous month	`Alt` + `Page Down` / `Alt` + `Page Up`
Calendar Go to the start/end of the week	`Alt` + `Home` / `Alt` + `End`
Calendar Switch to Full Week view	`Alt` + `-` or `Ctrl` + `Alt` + `3`
Calendar Switch to Work Week view	`Ctrl` + `Alt` + `2`
Calendar Go to previous/next appointment	`Ctrl` + `,` or `Ctrl` + `Shift` + `,` / `Ctrl` + `.` or `Ctrl` + `Shift` + `.`
Calendar Set up recurrence for an open appointment or meeting	`Ctrl` + `G`
People Dial a new call	`Ctrl` + `Shift` + `D`
People Find a contact or other item (Search)	`F3` or `Ctrl` + `E`
People Enter a name in the Search Address Books box	`F11`
People In Table or List view of contacts, go to first contact that starts with a specific letter	`Shift` + `letter`
People Select all contacts	`Ctrl` + `A`
People Create a message with selected contact as subject	`Ctrl` + `F`
People Create a contact (when in Contacts)	`Ctrl` + `N`
People Create a contact (from any Outlook view)	`Ctrl` + `Shift` + `C`
People Open a contact form for the selected contact	`Ctrl` + `O`
People Create a contact group	`Ctrl` + `Shift` + `L`
People Print	`Ctrl` + `P`
People Update a list of contact group members	`F5`
People Go to a different folder	`Ctrl` + `Y`
People Open the Address Book	`Ctrl` + `Shift` + `B`
People Use Advanced Find	`Ctrl` + `Shift` + `F`
People In an open contact, open the next contact listed	`Ctrl` + `Shift` + `.`
People Find a contact	`F11`
People Close a contact	`Esc`
People Send a fax to the selected contact	`Ctrl` + `Shift` + `X`
People Open the Check Address dialog box	`Alt` + `D`
People In a contact form, under Internet, display the Email 1 information	`Alt` + `Shift` + `1`
People In a contact form, under Internet, display the Email 2 information	`Alt` + `Shift` + `2`
People In a contact form, under Internet, display the Email 3 information	`Alt` + `Shift` + `3`
People: Electronic Business Cards Open the Add list	`Alt` + `A`
People: Electronic Business Cards Select text in Label box when the field with a label assigned is selected	`Alt` + `B`
People: Electronic Business Cards Open the Add Card Picture dialog box	`Alt` + `C`
People: Electronic Business Cards Place cursor at beginning of Edit box	`Alt` + `E`
People: Electronic Business Cards Select the Fields box	`Alt` + `F`
People: Electronic Business Cards Select the Image Align drop-down list	`Alt` + `G`
People: Electronic Business Cards Select color palette for background	`Alt` + `K` , then `Enter`
People: Electronic Business Cards Select Layout drop-down list	`Alt` + `L`
People: Electronic Business Cards Remove a selected field from the Fields box	`Alt` + `R`
Tasks Accept a task request	`Alt` + `C`
Tasks Decline a task request	`Ctrl` + `D`
Tasks Find a task or other item	`Ctrl` + `E`
Tasks Open the Go to Folder dialog box	`Ctrl` + `Y`
Tasks Create a task (when in Tasks)	`Ctrl` + `N`
Tasks Create a task (from any Outlook view)	`Ctrl` + `Shift` + `K`
Tasks Open selected item	`Ctrl` + `O`
Tasks Print selected item	`Ctrl` + `P`
Tasks Select all items	`Ctrl` + `A`
Tasks Delete selected item	`Ctrl` + `D`
Tasks Forward a task as an attachment	`Ctrl` + `F`
Tasks Create a task request	`Ctrl` + `Shift` + `Ctrl` + `U`
Tasks Switch between the Folder Pane, Tasks list, and To-Do Bar	`Tab` or `Shift` + `Tab`
Tasks Undo last action	`Ctrl` + `Z`
Tasks Flag an item or mark complete	`Insert`
Groups Expand/collapse a single selected group	`Arrow Right` / `Arrow Left`
Groups Select the previous/next group	`Arrow Up` / `Arrow Down`
Groups Select the first/last group	`Home` / `End`
Groups Select the first item on screen in an expanded group or the first item off screen to the right	`Arrow Right`
Print Open Print tab in Backstage view	`Alt` + `F` , then `P`
Print To print an item from an open window	`Alt` + `F` , then `F` , then `1`
Print Open Page Setup from Print Preview	`Alt` + `S` , or `Alt` + `U`
Print To select a printer from Print Preview	`Alt` + `F` , then `P` , then `I`
Print To Define Print Styles	`Alt` + `F` , then `P` , then `L`
Print To open Print Options	`Alt` + `F` , then `P` , then `R`
Send/Receive Start a send/receive for all defined Send/Receive groups with Include this group in Send/Receive (F9) selected. This can include headers, full items, specified folders, items less than a specific size, or any combination that you define	`F9`
Send/Receive Start a send/receive for the current folder, retrieving full items (header, item, and any attachments)	`Shift` + `F9`
Send/Receive Start a send/receive	`Ctrl` + `M`
Send/Receive Define Send/Receive groups	`Ctrl` + `Alt` + `S`
Macros Play Macro	`Alt` + `F8`
Views: Table View Open an item	`Enter`
Views: Table View Select all items	`Ctrl` + `A`
Views: Table View Go to the item at the bottom/top of the screen	`Page Down` / `Page Up`
Views: Table View Extend or reduce the selected items by one item	`Shift` + `Arrow Up` or `Shift` + `Arrow Down`
Views: Table View Go to the next or previous item without extending the selection	`Ctrl` + `Arrow Up` or `Ctrl` + `Arrow Down`
Views: Table View Select or cancel selection of the active item	`Ctrl` + `Space`
View: Business Cards/Address cards Select a specific card in the list (type one or more letters of the name that the card)	`a-z`
View: Business Cards/Address cards Select the previous/next card	`Arrow Up` / `Arrow Down`
View: Business Cards/Address cards Select the first/last card in the list	`Home` / `End`
View: Business Cards/Address cards Select the first card on the current/next page	`Page Up` / `Page Down`
View: Business Cards/Address cards Select the closest card in the next/previous column	`Arrow Right` / `Arrow Left`
View: Business Cards/Address cards Select or cancel selection of the active card	`Ctrl` + `Space`
View: Business Cards/Address cards Extend the selection to the previous card and cancel selection of cards after the starting point	`Shift` + `Arrow Up`
View: Business Cards/Address cards Extend the selection to the next card and cancel selection of cards before the starting point	`Shift` + `Arrow Down`
View: Business Cards/Address cards Extend the selection to the previous card, regardless of the starting point	`Ctrl` + `Shift` + `Arrow Up`
View: Business Cards/Address cards Extend the selection to the next card, regardless of the starting point.	`Ctrl` + `Shift` + `Arrow Down`
View: Business Cards/Address cards Extend the selection to the first/last card in the list	`Shift` + `Home` / `Shift` + `End`
View: Business Cards/Address cards Extend the selection to the first/last card on the previous page	`Shift` + `Page Up` / `Shift` + `Page Down`
View: Business Cards/Address cards Move to the next/previous field and control (in an open card)	`Tab` / `Shift` + `Tab`
View: Business Cards/Address cards Close the active card (in an open card)	`Enter`
View: Business Cards/Address cards Add a line in a multiline field (when a field in a card is selected)	`Enter`
View: Business Cards/Address cards Move to the beginning/end of a line (when a field in a card is selected)	`Home` / `End`
View: Business Cards/Address cards Move to the beginning/end of a multiline field (when a field in a card is selected)	`Page Up` / `Page Down`
View: Business Cards/Address cards Move to the previous/next line in a multiline field (when a field in a card is selected)	`Arrow Up` / `Arrow Down`
View: Business Cards/Address cards Move to the previous/next character in a field (when a field in a card is selected)	`Arrow Left` / `Arrow Right`
View: Timeline (Tasks) - When an item is selected Select the previous/next item	`Arrow Left` / `Arrow Right`
View: Timeline (Tasks) - When an item is selected Select several adjacent items	`Shift` + `Arrow Left` or `Shift` + `Arrow Right`
View: Timeline (Tasks) - When an item is selected Select several nonadjacent items	`Ctrl` + `Arrow Left` + `Space` or `Ctrl` + `Arrow Right` + `Space`
View: Timeline (Tasks) - When an item is selected Open the selected items	`Enter`
View: Timeline (Tasks) - When an item is selected Select the first/last item on the timeline (if items are not grouped) or the first item in the group	`Home` / `End`
View: Timeline (Tasks) - When an item is selected Display (without selecting) the first/last item on the timeline (if items are not grouped) or the first item in the group	`Ctrl` + `Home` / `Ctrl` + `End`
View: Timeline (Tasks) - When a group is selected Expand the group	`Enter` or `Arrow Right`
View: Timeline (Tasks) - When a group is selected Collapse the group	`Enter or Arrow Left`
View: Timeline (Tasks) - When a group is selected Select the previous/next group	`Arrow Up` `Arrow Down`
View: Timeline (Tasks) - When a group is selected Select the first/last group on the timeline	`Home` / `End`
View: Timeline (Tasks) - When a group is selected Select the first item on screen in an expanded group or the first item off screen to the right	`Arrow Right`
View: Timeline (Tasks) - When a unit of time for days is selected Move backward/forward in increments of time that are the same as those shown on the time scale	`Arrow` Left / `Arrow Right`
View: Timeline (Tasks) - When a unit of time for days is selected Switch between active view, To-Do Bar, Search and back to active view	`Tab` and `Shift` +Tab
View: Calendar - Day/Week/Month View from 1 through 9 days	`Alt` + `key for number of days`
View: Calendar - Day/Week/Month View 10 days	`Alt` + `0`
View: Calendar - Day/Week/Month Switch to weeks	`Alt` + `-`
View: Calendar - Day/Week/Month Switch to months	`Alt` + `=`
View: Calendar - Day/Week/Month Move between Calendar, TaskPad, and the Folder List	`Ctrl` + `Tab` or `F6`
View: Calendar - Day/Week/Month Select the previous appointment	`Shift` + `Tab`
View: Calendar - Day/Week/Month Go to the previous/next day	`Arrow Left` / `Arrow Right`
View: Calendar - Day/Week/Month Go to the same day in the next/previous week	`Alt` + `Arrow Down` / `Alt` + `Arrow Up`
View: Calendar - Day View Select the time that begins your work day	`Home`
View: Calendar - Day View Select the time that ends your work day	`End`
View: Calendar - Day View Select the previous/next block of time	`Arrow Up` / `Arrow Down`
View: Calendar - Day View Select the block of time at the top/bottom of the screen	`Page Up` / `Page Down`
View: Calendar - Day View Extend or reduce the selected time	`Shift` + `Arrow Up` or `Shift` + `Arrow Down`
View: Calendar - Day View Move an appointment up or down	`Alt` + `Arrow Up` or `Alt` + `Arrow Down`
View: Calendar - Day View Change an appointment's start or end time	`Alt` + `Shift` + `Arrow Up` or `Alt` + `Shift` + `Arrow Down`
View: Calendar - Day View Move selected item to the same day in the next week	`Alt` + `Arrow Down`
View: Calendar - Day View Move selected item to the same day in the previous week	`Alt` + `Arrow Up` or `Alt` + `Arrow Down`
View: Calendar - Week View Go to the start/end of work hours for the selected day	`Home` / `End`
View: Calendar - Week View Go up/down one page view in the selected day	`Page Up` / `Page Down`
View: Calendar - Week View Change the duration of the selected block of time	`Shift` + `Arrow Left` , `Shift` + `Arrow Right` , `Shift` + `Arrow Up` , `Shift` + `Arrow Down` or `Shift` + `Home` or `Shift` + `End`
View: Calendar - Month View Go to the first day of the week	`Home`
View: Calendar - Month View Go to the same day of the week in the previous/next page	`Page Up` / `Page Down`
Date Navigator Go to the first/last day of the current week	`Alt` + `Home` / `Alt` + `End`
Date Navigator Go to the same day in the previous/next week	`Alt` + `Arrow Up` / `Alt` + `Arrow Down`