A quick question. Can the number of “pinned” files be changed, (either increased or decreased), in Calc?
If so how do you go about it?
A quick answer. 
You pin files in the required quantity via the Start Center.
In the Calc module (and others) you will see pinned files at the top of the Recent Files list.
I can see when I click on “Recent Documents” a list of 20.
I can’t at the moment see how I would be able to extend that to say 25.
How would I go about that?