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RStudio

Comment or uncomment lines

CmdShiftC

Mac Desktop app RStudio IDE

Practice this

Press Ctrl + Shift + C to comment or uncomment lines in RStudio. On a Mac, press Cmd + Shift + C instead.

Where it works: Source editor

Every documented variant

Variants of this shortcut
System	Environment	Keys
Mac	Desktop app	`CmdShiftC`
Windows	Desktop app	`CtrlShiftC`

Where this comes from

Keyboard Shortcuts in the RStudio IDE - Posit Support

Documentation checked on 2026-09-14. That is a documentation review, not a test run inside the application.

The same task in other apps

Comment lines with line comments Android Studio Cmd + /
Add or remove a single line comment DBeaver Ctrl + /
Toggle a line comment Chrome DevTools Cmd + /
Toggle a line comment Eclipse IDE Ctrl + /
Toggle a comment Godot Engine Cmd + K
Toggle a line comment IntelliJ IDEA Cmd + /
Toggle a single line comment Notepad++ Ctrl + Q
Comment or uncomment a line Power BI Desktop Ctrl + /
Comment out the selection SQL Server Management Studio Ctrl + K then Ctrl + C
Toggle a line comment Sublime Text Cmd + /
Toggle line comments Visual Studio Ctrl + /
Toggle a line's comment state Visual Studio Code Cmd + /

More RStudio shortcuts

Reformat the selection Cmd + Shift + A
Find and replace Cmd + F
Find in files Cmd + Shift + F
Rename a symbol in scope Cmd + Option + Shift + M
Delete the line Cmd + D
Insert the assignment operator Option + -
Insert the pipe operator Cmd + Shift + M
Show help for the function at the cursor F1

See every RStudio shortcut

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