Altium Library Issues- Replace uknown schematic library with know library
You will need to add your library to your project. The easiest method would probably be to right-click your project name and select &quot;Add Existing to Project...&quot; and browse to your library.
If you want to add libraries to be available to ALL of your projects, click on the gear in the upper right-hand corner (&quot;Setup system Preferences&quot;) and under &quot;System&quot; select &quot;Default Locations&quot;.


The second path it asks for is the &quot;Library Path&quot;, which allows you to enter a top-level directory in which your library files are located. Altium will search inside this directory recursively to find any libraries present.

Once selected, these libraries will appear in your &quot;Components&quot; panel when you're working inside the editor.