The DoliMyAdmin module has some parameters that you can configure according to your needs.
Number of rows of records per page (default 25) (this setting is independent of Dolibarr's, so you can change it without affecting other Dolibarr lists)
Display or not the prefixes of the tables (the "llx_") in the list of these (default Yes)
Display or not the dictionaries tables in the list of tables (default Yes)
Dictionaries are tables with the prefix "llx_c_".
There are many of them, you can hide them to reduce the number of tables to manage.