I would like to comment multiple lines in TeXworks (installed as part of MiKTeX) and I need to know the keyboard trick for commenting/uncommenting at once.
MiKTeX installs the TeXworks editor as standard. This has the ability to add/remove comments from multiple line (placing
% at the start) using the shortcuts Ctrl+Shift+] (insert comment)/Ctrl+Shift+[ (remove comment). The key binds can be customised (particularly useful if your keyboard makes these combinations inconvenient).