Mark as unread

`↑ Shift` + `U`

All hotkeys for Gmail

Compose and chat Previous message in an open conversation	`P`
Compose and chat Next message in an open conversation	`N`
Compose and chat Focus main window	`↑ Shift` + `Esc`
Compose and chat Focus latest chat or compose	`Esc`
Compose and chat Advance to the next chat or compose	`Ctrl` + `.`
Compose and chat Advance to previous chat or compose	`Ctrl` + `,`
Compose and chat Send	`Ctrl` + `⤶ Enter`
Compose and chat Add cc recipients	`Ctrl` + `↑ Shift` + `C`
Compose and chat Add bcc recipients	`Ctrl` + `↑ Shift` + `B`
Compose and chat Access custom from	`Ctrl` + `↑ Shift` + `F`
Compose and chat Insert a link	`Ctrl` + `K`
Compose and chat Go to next misspelled word (Mac only)	`⌘ Cmd` + `;`
Compose and chat Open spelling suggestions	`Ctrl` + `M`
Formatting text Previous font	`Ctrl` + `↑ Shift` + `5`
Formatting text Next font	`Ctrl` + `↑ Shift` + `6`
Formatting text Decrease text size	`Ctrl` + `↑ Shift` + `-`
Formatting text Increase text size	`Ctrl` + `↑ Shift` + `+`
Formatting text Bold	`Ctrl` + `B`
Formatting text Italics	`Ctrl` + `I`
Formatting text Underline	`Ctrl` + `U`
Formatting text Numbered list	`Ctrl` + `↑ Shift` + `7`
Formatting text Bulleted list	`Ctrl` + `↑ Shift` + `8`
Formatting text Quote	`Ctrl` + `↑ Shift` + `9`
Formatting text Indent less	`Ctrl` + `[`
Formatting text Indent more	`Ctrl` + `]`
Formatting text Align left	`Ctrl` + `↑ Shift` + `L`
Formatting text Align center	`Ctrl` + `↑ Shift` + `E`
Formatting text Align right	`Ctrl` + `↑ Shift` + `R`
Formatting text Remove formatting	`Ctrl` + `\`
Actions Move focus to toolbar	`,`
Actions Select conversation	`X`
Actions Toggle star/rotate among superstars	`S`
Actions Archive	`E`
Actions Mute conversation	`M`
Actions Report as spam	`!`
Actions Delete	`#`
Actions Reply	`R`
Actions Reply in a new window	`↑ Shift` + `R`
Actions Reply all	`A`
Actions Reply all in a new window	`↑ Shift` + `A`
Actions Forward	`F`
Actions Forward in a new window	`↑ Shift` + `F`
Actions Update conversation	`↑ Shift` + `N`
Actions Archive conversation and go previous	`]`
Actions Archive conversation and go next	`[`
Actions Undo last action	`Z`
Actions Mark as read	`↑ Shift` + `I`
Actions Mark as unread	`↑ Shift` + `U`
Actions Mark unread from the selected message	`_`
Actions Mark as important	`+`
Actions Mark as important	`=`
Actions Mark as not important	`-`
Actions Expand entire conversation	`;`
Actions Collapse entire conversation	`:`
Actions Add conversation to Tasks	`↑ Shift` + `T`
Hangouts Show menu	`H` + `M`
Hangouts Show archived hangouts	`H` + `A`
Hangouts Show Hangout requests	`H` + `I`
Hangouts Focus on the conversation list	`H` + `C`
Hangouts Open phone	`G` + `P`
Hangouts Open phone	`H` + `P`
Jumping Go to Inbox	`G` + `I`
Jumping Go to Starred conversations	`G` + `S`
Jumping Go to Sent messages	`G` + `T`
Jumping Go to Drafts	`G` + `D`
Jumping Go to All mail	`G` + `A`
Jumping Go to Contacts	`G` + `C`
Jumping Go to Tasks	`G` + `K`
Jumping Go to label	`G` + `L`
Threadlist selection Select all conversations	`*` + `A`
Threadlist selection Deselect all conversations	`*` + `N`
Threadlist selection Select read conversations	`*` + `R`
Threadlist selection Select unread conversations	`*` + `U`
Threadlist selection Select starred conversations	`*` + `S`
Threadlist selection Select unstarred conversations	`*` + `T`
Navigation Back to threadlist	`U`
Navigation New conversation	`K`
Navigation Older conversation	`J`
Navigation Open conversation	`O`
Navigation Open conversation	`⤶ Enter`
Navigation Go to next Inbox section	`
Navigation Go to previous Inbox section	`~`
Application Compose	`C`
Application Compose in a new tab	`D`
Application Search mail	`/`
Application Search chat contacts	`G`
Application Open "more actions" menu	`.`
Application Open "move to" menu	`V`
Application Open "label as" menu	`L`
Application Open keyboard shortcut help	`?`