How to change font in column headers of base datasheet

I have a sub-form in a form in LO Base. The column headers are in very small font, and not easily visible. I cannot find a way
to edit the fonts. (I emphasize that I refer to the column headers, not the data in the columns, whose font I can change.)

Can anyone show me how to make the changes please?

Without digging deep into the code, there isn’t any setting for changing fonts in column titles. The Table Control is really multiple controls grouped together. If your fonts are small, the more likely cause is the Zoom factor. It is the slider control in the lower right corner of the form or, from the menu, View->Zoom.

Ratsinger : I had not seen the zoom slider. I can use this and it will do the job! Many thanks indeed for your advice.
DocTom.