excel control button
 

I Have excel spread sheets designed and within this
spread sheet am using a control Button to reset various
cells to a default setting.

This spread sheet is protected and is being used on a
network within this office. One of the users on the
network which uses these spread sheets had been using it
with no problem....until that computer screen resolution
was changed to a higher resolution. Since it was
changed to a higher resolution...when the control button
is used, it reduces in size, each time until it
disapears. No other features of the spread sheet is
affected.

Any Help would please appreciated.

Tom