When the undo is disabled

I’m using a script to work on. However, the undo function is disabled when multiple glyph are selected by switching from currentTab to ‘Text’ mode.

  1. Is there a reason why it’s disabled?
  2. Is there a way to activate the undo function?

Undo history is stored per glyph. You would need to undo changes per glyph too.

For example, the width of multiple glyphs was changed from 1000 to 1300 using scripts. Can undo at one time in Fontview, I want to do the same in current tab. Would it be possible?

Not in Edit View.

You should be able to undo each individual glyph from the edit view.