to select some titles in my editor

Hello,
Using PhpStorm 2017.2.4 very often I open many files in my editor(say more 10) and
only 1-2 of them are files I work most of time. If there is a way to star/asterisk/make titles bold these 1-2 files amonth the all files
helping me to select by selected titles(filename) these files among the rest of files?


Thanks!