Asset Marker allowes you to mark all assets of a specific type in your blend file or specific Asset types in a Asset Library.
The addon comes with a quick accesable Sidebar Panel to mark/unmark Asset Types in your current Scene
In the Addons Preferences choose which Asset Types to mark in a specified Asset Library, Executing this will open all the Asset Library (blend) files in your library and mark or unmark the assets.
Note: Active Types will get Marked while Inactive ones will get unmakred.
