How to change screenlayout rows/ columns

[Adri]

How can I decrease (of increase) the number of rows and columns in the screen?
I can not find it in the manual. Please advise and/or refer me to the right page of the manual.
Thanks in advance.

[sven-l]

You can either increase the zoom factor or disable the grid lines (see attached screenshot) and add cell border lines only for the cells you want to make visible.