How to change font size of the sheet name?

The default font size of hte sheet laber in Libre Calc is to small for me. It is easy to rename the sheet, but I can not enlarge the font. Thank you for a hint, Jara

thank you :-), this seems to be the way, I have changed the stroll bare size to 25 px ant the font has resized adequatelly. It is now fine and perfect,thank you