Undo, Redo buttons in mesh module?

Use of the platform
1

Please help. I can’t find the undo/redo buttons.

Where are the undo/redo buttons in mesh module? I mistakenly deleted a group and would like to restore it by clicking undo. But there is no UNDO/REDO button available here. Same with shaper module. Where are the UNDO/REDO buttons?

2

Unfortunately there is no undo/redo in SMESH or GEOM.
But for SHAPER the buttons are available in the toolbar.