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In Eclipse it is possible to comment out multiple lines by selecting them and executing CTRL + /:

// helloworld

Is this possible in Notepad++ as well instead of typing // in front of an individual multiple lines?

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up vote 27 down vote accepted

Select desired lines and then press CTRL+Q. This will toggle comments on and off.

Also, I've just recently become a fan of ALT + Left Mouse Click to select multiple lines and just manually comment those lines with //.

I've found the ALT + Left Mouse Click trick to work well with Visual Studio, JetBrain products, Notepad++ but not Eclipse.

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The ALT + LMC and subsequently // works in .scala as well. To uncomment: ALT + LMC and subsequently two times DEL – Alfred Jul 30 '14 at 20:01
For the curious, alt + shift + a toggles block selection mode in eclipse – VitaminYes Dec 4 '14 at 17:11
Select multiply lines and Ctrl+Q is faster than multiline select and // – Pacerier Jun 30 '15 at 2:57
"This will toggle comments on and off" as VitaminYes wrote. If you want to re-commment the commented lines, see @john-robertson 's response – malarres Sep 16 '15 at 14:20

In notepad++ I believe that the shortcut is CTRL+Q for commenting the code.

You can go to Settings > Shortcut Mapper to change this to match your preference.

The default for a block comment is CTRL+SHIFT+Q. So you can highlight the block of code then use this shortcut.

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Ok I will check this and let you know the outcome – Alfred Jul 30 '14 at 19:34
CTRL + SHIFT + Q results in /* */ in a .java file – Alfred Jul 30 '14 at 19:40
These are the different comments for different languages. Here is a list of supported languages natively in Notepad++: – Dan Smith Jul 30 '14 at 19:42
So how do you uncomment in HTML? – Patrick Szalapski Sep 22 '14 at 13:20
@DanSmith, Dam I can't uncomment the commented code. What's the opposite of Ctrl-Shift-Q? – Pacerier Jun 30 '15 at 3:00

Also CTRL+K works well in Notepad++ to comment. If you had existing comments in a long block you are commenting, CTRL+Q will uncomment your actual comments, where CTRL+K just add another level of // in front. CTRL+SHIFT+K removes a single line comment from the selection.

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This is a Ctrl-Q bug actually. If there are half commented lines and half uncommented lines, Ctrl-Q should comment them all, then uncomment them all, then comment them all again. – Pacerier Jun 30 '15 at 3:09
Verified that CTRL+K works as well to comment out in Notepad++ – Alfred Jul 18 '15 at 18:56

Use ctrl + shift + Q for multiline comments and ctrl + Q for single line comments.

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Welcome to Super User! This duplicates another answer and adds no new content. Please don't post an answer unless you actually have something new to contribute. – DavidPostill Oct 23 '15 at 21:31

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