Loop Selection??

I am new,  and extremely sorry to ask this stupid question. But I cant loop a selection of chords for playback for section pracice.

I select the measures, then hit loop button and it plays right throug the selection.

Or, I right click on the selection and select 'play selection", then it does stop at end of selection - but stops there.

So.... the stupid question: How to select a few measurs and play that back... as a loop?

(By the way i searched "loop selection", it came back with folders or thread titles, with no indication my search phrase was inside any of them)