Hi,
thanks for your post, and sorry for the trouble.
I see what you mean, but I don’t think that this will be possible. From everything I know, the external JavaScript library that TablePress uses, does not support both these things at the same time.
You could however try it, by using the collapse
mode of the Responsive Tables Extension from https://tablepress.org/extensions/responsive-tables/ as described, and having “Horizontal Scrolling” checkbox turned on on the table’s “Edit” screen.
Then, you could turn off collapsing for certain columns by adding something like this to the “Custom Commands” textfield on the table’s “Edit” screen:
"columnDefs": [ { "className": "all", "targets": [ 3, 4 ] } ]
This example would turn collapsing off for columns 4 and 5 of the table (counting starts with 0 in the code).
Regards,
Tobias