Turning off word-wrap with less during paging?

Question

I can get the effect that I want from running less -S but it seems fishy to me that there is no way to render the input without word-wrap after the file is opened.

Is there anyway to

less /tmp/longtext

And then after you have it up to disable wordwrap without exiting and restarting.

Answer 1

Inside less, press - then S.

This technique is applicable generally in less: - will toggle the command-line option corresponding to the next key pressed.