I am editing a file and I want to set the tab width (more likely the indent width) to 2 and I have come across a command
(setq tab-width 2) but when I use
Alt-x) on my system and I enter
(setq tab-width 2) I get the message [No match].
I think the keystroke
M-x is the wrong one. I get list of commands to select from, but what I am looking for is the right place to change a setting in Emacs with a Lisp command.