In Eclipse it is possible to comment out multiple lines at once by selecting them and executing CTRL + /:
// helloworld
Is this possible in Notepad++ as well instead of typing /+/ in front of each individual line?
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.
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.
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.
If you prefer only using the mouse, install the "Customize Toolbar" plugin from the plugin manager, and add "Single Line Comment" and "Single Line Uncomment" buttons.
An alternative is to use a macro with a custom shortcut (CTRL+Q didn't work on javascript inside a .html document)
The trick works for a single line comment only.
Create the macro :
place the cursor in your doc and type:
//
Macro > Stop recording
To quickly comment a line :
Place the cursor at the beginning of the line to comment and press the shortcut you defined for the macro.