3 people found this helpful
It's because the new toolbar has slightly bigger buttons to accommodate HiDPI displays. On smaller displays, all the buttons don't fit anymore.
- Buy a new monitor (kidding!)
- Click the little gear button in your screen shot and disable buttons you don't use very often to make room
- Object > Text Frame Options and set the columns there (Ctrl/Cmd B is the shortcut)
This is a related post that you may find helpful (not to mention that the Frame Fitting buttons are also missing from your screen, and perhaps you haven't noticed that yet!)
That did the trick. I had to disable quite a lot of buttons but I can now see my columns. Thank you so much for the help.
You are very welcome!