Column lines
 

Can anyone help?
Since exploring unfamiliar icons on the tool bar on my Office 2000
Professional, my Excel worksheets now only show row separation lines, the
column separation lines are not displayed.
Ive tried accessing all the tools and formatting options and i've removed
the Office 2000 software and re-installed several times but it with no avail.
This happens on all past and present worksheets.
Any help or suggestions would be greatly appreciated.
In anticipation, Thanks. tee.cee