Undoing a Paste does not always undo everything

If you paste text into the editor from another source and it changes the font size, Ctrl+Z to undo will not undo the change in font size.

To replicate…

Open a new scrivener project.

Type one letter to see what size is normal.

Delete that letter

Open the pdf manual. Copy some text that is a heading of some sort (bold and larger than normal)

Paste that into scrivener

Ctrl + Z to undo.

Start typing… your text will be the size that the pasted text was.