How to edit the list of substitution functions?

Question

phpstorm

Searched in Settings/Editor/Appearance
There is no list of features that the editor offers.
Target. Remove unnecessary functions from php, css, js so that only what I usually use is substituted. I'll add the rest by hand.
For example, I add a style in css, press the letter "b" and I get a lot of hints on the letter B. How can I remove the redundant ones? Leaving only the background? This is just an example.