Preview without compile?


I seem to have read somewhere that there is a way to kind of ‘preview’ the output before compiling?
Is this correct? If so, how do I generate such a preview, and can this be done for a single selected note in the binder?

At the moment I’m kind of heavily experimenting with page format containing images and their caption.
Up to now I compile each time and save with an incremental number to be able to preview.

Wonder if there’s a better way?