Afraid you can't

"katya_1978" wrote:

I am using the Freeze Panes function to freeze the titles (rows) and
sub-titles (columns). it is working fine but the black line that appears when
using this function is ugly and confuses the user of the spreadsheet. Can I
change the colour of this line to match the background or even remove the
line altogether without loosing the functionality of the Freeze Panes option?