It might be because the cell has a border.

"Dave_in_NoHo" wrote:

In all my experience with Excel, the active cell is marked with a bold border
around it, to make it easy to find.
I am now working on a machine in which the active cell is marked with a
border of two thin lines.

How do I change it back?
How do I change the border of the active cell so it is always a bold, black
border?