I always look at the preview window or default preview section on glyphsapp to check the current design. But when switched to vertical, the preview on both windows do not work anymore.
It would help tremendously if the preview function works on vertical type design. When can I expect to see it working?
The Preview in the main window and the Preview panel show the vertical setting already. Is there something specific that is broken?
You need to resize the Preview Panel to a portrait orientation (make it tall and narrow).