- Export
- Go to other program - InDesign or web browser
- Review, and decide a change.
- Switch back to Glyphs
- Apply change
- Repeat steps
(Obviously in a complex layout, InDesign and web browser testing is better.) One of the big advantages of Glyphs for me is being always able to go from the glyph edit view then out to the paragraph view in the same window. A preset zoom hotkey (like CMD+0, but perhaps slightly further out than “Zoom fit to Width”) would make this just a little quicker.