How to hide the project versions dropdown in the Knowledge base site?

If a user has access to multiple project versions, the version dropdown would appear at the top left of the Knowledge base site. If you want to disable the versions dropdown option, you can use the below solution.

How can users navigate between the project versions?
If you implement the below solution, the user must know the exact URL to access the versions.

Solution

1. Go to Settings → Knowledge base site → Custom CSS & JavaScript, and Custom CSS tab is the default selection
2. Paste the below CSS snippet in the window

header .header_bottom .header_bottom_nav ul li.versions-selection {
    display: none;
}

3. Click Save

Outcome