Can I reduce the width of the mixer tracks?

Is there a way to shrink the width of the tracks in the mixer? I want to see more of them at the same time. Even if it took away the buttons it would be OK for me

Right now, no. (unfortunately) BUT What you can do is right-click the master track -> Show multiple rows of tracks when size permits. You should be able to view twice as many mixer channels now :)

Thanks, that's very useful!

Although there is an advanced ui pref to decrease or increase EVERYTHING all at once ;) so you could shrink all of reapers interface. Lol

Try using track folders! :) Right click in the background of the mixer and check Clickable icon for folder tracks to show/hide children. It's a lifesaver.