New answers tagged user-interface
1
v12.2 update.
If you have just inserted the line, then Undo will remove it.
If the line is at the same height as an edge of the right bracket of a cell, then select this cell, go to menu Insert > Horizontal Line > None or uncheck the box.
This is the inverse procedure of creating the line.
I have a notebook with a line at the end, apparently not ...
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