Install and Activate Content Control
1. Go to your WordPress admin area
2. In the side menu, hover over (or click) Plugins and click Add New
3. Search for Content Control
4. Click Install Now
5. Click Activate
How To Find Content Control on Your Site
Getting to the Content Control Admin Page
In the side menu, hover (or click) Settings and click Content Control.
You’ll see the main Content Control Admin page. Your list of restrictions displays by default.
Take A Quick Tour of the Global Restrictions Tab to learn more.
Getting to the Content Control Block Controls
Edit a post or page using the block editor (Gutenberg). Add a block or click an existing block. You’ll see the Content Controls block settings on the sidebar.
Click Enable Controls to begin adding restrictions to your block!
Other Ways
Full Site Editor
If your theme supports full site editing, go to Appearance > Editor. Create or click an existing block to see the Content Controls block settings in the sidebar.
Widget Editor
From WordPress 5.8 on up, you can see the Content Controls block settings in the widgets editor. Go to Appearance > Widgets. Create or click an existing block to see the Content Controls block settings in the sidebar.