I want to loop a section while I work out which bits need dealing with. Atm, the only way I can find of looping is by making a selection first. While this allows editing (and is a good way of restraining it), the overlay makes it impossible to see what I’m doing properly.
I was hoping that setting Time Markers would allow selection-free looping but it seems not. The online manual is silent on this.
Does anyone know of a way?
rectangular selection is how I do what you are asking
but I, personally, never loop
ok:
Time Select a range and press loop
is what I assume you are doing
Change the opacity of selection in Prefs to see better
Time markers are for just that; they aren’t loop end points
That’s too much faff! 
I think I need to put out an FR for dedicated Loop Markers.
Really? I changed the opacity on selection some time back and it is certainly better for my needs
But not when you’ve just noticed it’s easily accessible from the Display Panel! 