how to silence audio [SOLVED]

i used audacity years ago and im sure there was a way to mute part of a recoding, but i cant find it. can anyone help?

“Edit menu > Remove Special > Silence Audio (Ctrl+L)”
http://manual.audacityteam.org/o/man/edit_menu_remove_special.html

Is that what you’re looking for?

thats it. thanks