Toggle folding without right-click?

When a header is folded, there’s a three dot icon to click to unfold, but is there a way to fold a header without having to right click and select “toggle folding”? Could the three dot icon be persistent as a fold or unfold? Or is it possible to double click the header icon the left to fold/unfold?

Try: cmd + ‘

That’s the shortcut for toggling folding

This is exactly what I was looking for — thanks!

Forgot to report back – this shortcut doesn’t seem to be working in Lettera for me. Works fine in Bear, but doesn’t seem to be functional in Lettera.