SketchUp's own undo history can be saved more than 100 times (not tested specifically), but it does not have a history panel like Photoshop. If you want to restore to an earlier state, you can only press Ctrl + Z all the way back. This function can freely choose the number of undo or redo, and quickly find the record you want.
repeatUndoTool（repeatUndoTool）动画教程
You can choose to undo or redo the number of times, quickly find the record you want.
很方便！