Plugin window. No bypass or undo/redo buttons

Hi. I hope you can help again. For some reason the top bar all my plugin window has disappeared where the undo and redo buttons and bypass buttons are usually placed. Can you help me to get them back? I have clicked something, but have no idea what it would have been. This is effecting all montage and master effects. The joys of learning a new DAW. Thanks.

Here’s a screen shot for example.


Ah, there it is…but that’s a strange place for a setting that also affects plugins in the audio montage, not just the Master Section.

Ah!!! Thank you so much. Was starting to stress me out a bit, though I did learn some key commands to get round the issue. Thanks both. Gav