I have never seen this but if this is a Control Toolbar command button you
might try right clicking it and choosing Properties. Then change its
TakeFocusOnClick setting to False. Can't hurt and might help.

--
Jim
"Steve W" <Steve wrote in message
...
I've created a number of command buttons on a spreadsheet to run some
macros.
When I click them to run the macro however, the label text changes size
(shrinks). Anyone have any idea how to stop this?