If I understand your question correctly, you do not want the columns where you add or manage locations to be in the way? (The back end) so you would like to hide them correct?
If you have the latest version of SLP it is easy you just “grab” the header title of the column you want to hide, and drag it into the little box next to search. See attached.
If I have misunderstood your question (You arent asking about the actual layout in the front of the map I presumed…let me know.