Free wordpress plugin for searching categories while editing posts & pages

WP Admin Category Search is a free search plugin for searching categories while editing your posts or pages. It allows you to quickly find categories without scrolling through a long list of categories:

Step 1: Install WP Admin Category Search

Go to Plugins -> Install and search for WP Admin Category Search. Install and activate it by clicking the button

Step 2: When editing posts, search for categories…

Step 3: … and find and select them