Notepad++

Edit menu

Launch function completion ListBox

Ctrl + ↑   Shift + Space

All hotkeys for Notepad++

File menu
Open file

Ctrl + O

File menu
New file

Ctrl + N

File menu
Save file

Ctrl + S

File menu
Save as

Ctrl + Alt + S

File menu
Save all

Ctrl + ↑   Shift + S

File menu
Print

Ctrl + P

File menu
Exit

Alt + F4

File menu
Next document (also shows list of open files). Can be disabled - see Settings/Preferences/Global

Ctrl + ⭾ Tab

File menu
Previous document (also shows list of open files). Can be disabled - see above

Ctrl + ↑   Shift + ⭾ Tab

Search menu
...<keybs>5</keybs>: Jump down to next text marked. Use <keybs>0</keybs> for default found style

Ctrl + 1

File menu
Next document

Ctrl + Page Up

File menu
Previous document

Ctrl + Page Down

File menu
Close current document

Ctrl + W

Edit menu
Copy

Ctrl + C

Edit menu
Copy

Ctrl + Insert

Edit menu
Copy current line to clipboard

Ctrl + ↑   Shift + T

Edit menu
Cut

Ctrl + X

Edit menu
Cut

↑   Shift + Del

Edit menu
Paste

Ctrl + V

Edit menu
Paste

↑   Shift + Insert

Edit menu
Undo

Ctrl + Z

Edit menu
Undo

Alt + ⬅ Backspace

Edit menu
Redo

Ctrl + Y

Edit menu
Select all

Ctrl + A

Edit menu
Column mode select

Alt + ↑   Shift + ← ↑ → ↓

Edit menu
Column mode select

Alt + Mouse left click

Mouse gestures
(on fold point) Toggle collapsed state of this fold, and propagate below

Ctrl + Mouse left click

Edit menu
Column editor

Alt + C

Edit menu
Duplicate current line

Ctrl + D

Edit menu
Switch the current line position with the previous line position

Ctrl + T

Edit menu
Move current line or current selection if a single stream, up

Ctrl + ↑   Shift +

Edit menu
Move current line, or current selection if a single stream, Down

Ctrl + ↑   Shift +

Edit menu
Delete current line

Ctrl + L

Edit menu
Split lines

Ctrl + I

Edit menu
Join lines

Ctrl + J

Edit menu
Launch GoToLine dialog

Ctrl + G

Edit menu
Single line comment

Ctrl + Q

Edit menu
Single line uncomment

Ctrl + ↑   Shift + Q

Edit menu
Toggle single line comment

Ctrl + K

Edit menu
Block comment

Ctrl + ↑   Shift + K

Edit menu
(selection of one or more full lines) Insert tabulation or space (Indent)

⭾ Tab

Edit menu
(selection of one or more full lines) Remove tabulation or space (outdent)

↑   Shift + ⭾ Tab

Edit menu
Delete to start of word

Ctrl + ⬅ Backspace

Edit menu
Delete to end of word

Ctrl + Del

Edit menu
Delete to start of line

Ctrl + ↑   Shift + ⬅ Backspace

Edit menu
Delete to end of line

Ctrl + ↑   Shift + Del

Edit menu
Convert to lower case

Ctrl + U

Edit menu
Convert to UPPER CASE

Ctrl + ↑   Shift + U

Search menu
Go to matching brace (caret must be on a brace)

Ctrl + B

Edit menu
Launch CallTip ListBox

Ctrl + Space

Edit menu
Launch function completion ListBox

Ctrl + ↑   Shift + Space

Edit menu
Launch path completion ListBox

Ctrl + Alt + Space

Edit menu
Launch word completion ListBox

Ctrl + ⤶ Enter

Edit menu
Text direction RTL

Ctrl + Alt + R

Edit menu
Text Direction LTR

Ctrl + Alt + L

Incremental search widget
Next match (same as > button)

⤶ Enter

Incremental search widget
Previous match (same as < button)

↑   Shift + ⤶ Enter

Edit menu
Insert new unindented line above current

Ctrl + Alt + ⤶ Enter

Edit menu
Insert new unindented line below current

Ctrl + Alt + ↑   Shift + ⤶ Enter

Search menu
Launch find dialog

Ctrl + F

Search menu
Launch find and replace dialog

Ctrl + H

Search menu
Find next

F3

Search menu
Find previous

↑   Shift + F3

Search menu
Find in files

Ctrl + ↑   Shift + F

Search menu
Switch to search results window

F7

Search menu
Find (volatile) next

Ctrl + Alt + F3

Search menu
Find (volatile) previous

Ctrl + Alt + ↑   Shift + F3

Search menu
Select and find next

Ctrl + F3

Search menu
Select and find previous

Ctrl + ↑   Shift + F3

Search menu
Go to next found

F4

Search menu
Go to previous found

↑   Shift + F4

Search menu
Incremental search

Ctrl + ↑   Shift + I

Search menu
...<keybs>5</keybs>: Jump up to next text marked. Use <keybs>0</keybs> for default found style

Ctrl + ↑   Shift + 1

Search menu
Toggle bookmark

Ctrl + F2

Search menu
Go to next bookmark

F2

Search menu
Go to previous bookmark

↑   Shift + F2

Search menu
Select all between matching braces (caret must be on a brace)

Ctrl + Alt + B

View menu
Zoom in and zoom out

Ctrl + +

View menu
Zoom in and zoom out

Ctrl + -

View menu
Zoom in and zoom out

Ctrl + Mouse wheel up and down

View menu
Restore the original size from zoom

Ctrl + /

View menu
Toggle full screen mode

F11

View menu
Toggle post-it mode

F12

View menu
Collapse the current level

Ctrl + Alt + F

Run menu
Open in Safari

Ctrl + Alt + ↑   Shift + F

View menu
Fold all

Alt + 0

View menu
...to <keybs>8</keybs>: Collapse the level (1-8)

Alt + 1

View menu
Unfold all

Alt + ↑   Shift + 0

View menu
...<keybs>8</keybs> Uncollapse the level (1~8)

Alt + ↑   Shift + 1

Macro menu
Start to record / stop recording the macro

Ctrl + ↑   Shift + R

Macro menu
Play recorded macro

Ctrl + ↑   Shift + P

Macro menu
Trim trailing and save

Alt + ↑   Shift + S

Run menu
Launch run dialog

F5

Run menu
Get PHP help

Alt + F1

Run menu
Google search

Alt + F2

Run menu
Wikipedia search

Alt + F3

Run menu
Open file (name at cursor)

Alt + F5

Run menu
Open file in another instance (name at cursor)

Alt + F6

Run menu
Open in Chrome

Ctrl + Alt + ↑   Shift + R

Run menu
Open in Firefox

Ctrl + Alt + ↑   Shift + X

Run menu
Open in IE

Ctrl + Alt + ↑   Shift + I

Run menu
Send via Outlook

Ctrl + Alt + ↑   Shift + O

? menu
About

F1

? menu
Help contents

↑   Shift + F1

Mouse gestures
(on bookmark margin) Toggle bookmark

Mouse left click

Mouse gestures
(on fold point) Uncollapse this fold and all those below

↑   Shift + Mouse left click

Mouse gestures
Pop up context menu

Mouse right click

Mouse gestures
(on location pane, status bar) Go to line

Mouse double click

Mouse gestures
Select line

Mouse triple click

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dbForge SQL Complete
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Code Completion filtering the lookup list basing on expected type.
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Pause / continue reading
Read aloud

Ctrl + ↑   Shift + Space


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Insert a nonbreaking space.
Edit and move text and graphics

Ctrl + ↑   Shift + Space


Microsoft Word 2016
A nonbreaking space
Insert special characters

Ctrl + ↑   Shift + Space


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Insert non-breaking space Editors only
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Ctrl + ↑   Shift + Space


Adobe Premiere Pro (Windows)
Play In to Out
Multi camera

Ctrl + ↑   Shift + Space


IntelliJ IDEA (Windows, Linux)
Smart code completion
Editing

Ctrl + ↑   Shift + Space


Microsoft Visual Studio 2017 (Most used shortcuts)
[Text Editor, Workflow Designer] Edit.ParameterInfo
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Ctrl + ↑   Shift + Space


Chromebook and Chrome OS
Switch between the keyboard languages that you've set
Text editing

Ctrl + ↑   Shift + Space


LibreOffice Impress
Non-breaking spaces. Non-breaking spaces are not used for hyphenation and are not expanded if the text is justified
Editing text

Ctrl + ↑   Shift + Space


Brackets
Show Parameter Hint
General

Ctrl + ↑   Shift + Space


LibreOffice Writer
Non-breaking spaces. Non-breaking spaces are not used for hyphenation and are not expanded if the text is justified
General

Ctrl + ↑   Shift + Space


Google Sheets
Select all
Common actions

Ctrl + ↑   Shift + Space


Google Translator Toolkit
Show placeholder menu
Translation

Ctrl + ↑   Shift + Space


Delphi
Invoke code parameter hints
General

Ctrl + ↑   Shift + Space


Visual Studio Code (Linux)
Trigger parameter hints
Rich languages editing

Ctrl + ↑   Shift + Space


Visual Studio Code (Windows)
Trigger parameter hints
Rich languages editing

Ctrl + ↑   Shift + Space


Microsoft Excel 2016
When an object is selected, this shortcut selects all objects on a worksheet
Other useful shortcut keys

Ctrl + ↑   Shift + Space


Microsoft Visual Studio 2017 (All shortcuts)
Edit.ParameterInfo
Workflow Designer

Ctrl + ↑   Shift + Space


SQL Server Management Studio (SSMS)
Display parameter information
Microsoft IntelliSense

Ctrl + ↑   Shift + Space


Android Studio
Smart code completion (filters the list of methods and variables by expected type)
Writing code

Ctrl + ↑   Shift + Space


Opera
Open selected link in background tab
Link keys

Ctrl + ↑   Shift + Space


Duolingo
Replay audio slower
General

Ctrl + ↑   Shift + Space