Adding a new filter to Media Manager's search requires three actions:

1. Adding a new filter to the "DigiZuite_System_Framework_Search" search.
2. Adding the same filter to the searches "DigiZuite_System_Framework_My_Favorites" and "DigiZuite_System_Framework_My_Videoes" 
3. Creating a new label (if one does not already exist), whose Constant matches the new Filter's ID.

Media Manager uses the search "DigiZuite_System_Framework_Search" to search for assets. A user can input text in the wide text field (this is how any FreeText filters are used), and/or choose to add filters such as "Date" or "Keywords":

2.1 Adding an Asset type filter

First the filter must be added to the search "DigiZuite_System_Framework_Search":

1. Go to the DAM Center → System tools → ConfigManager.
2. Choose DigiZuite™ Media Manager.
3. Choose the version, which your Media Manager is set up to use.
4. Click the "Searches" tab.
5. Select the "DigiZuite_System_Framework_Search" search.
6. Add an asset type filter.
7. Save the search.
8. Populate the search (see UseSolr for a more detailed guide).
9. Ensure that the search has been populated by refreshing the page; if the "populate search cache" cog-wheel button is not present, the search has been successfully populated.

    10. Then you MUST add the same filter to the searches "DigiZuite_System_Framework_My_Favorites" and "DigiZuite_System_Framework_My_Videoes". 

    11. If a label with the correct Constant and Label does not exist, then you MUST create one. Unlike Add new meta data field to Media Manager's Asset Preview, if a label with a Constant matching the added filter's ID does not exists, the Media Manager will throw an error, which results in the filters being unavailable (see 1 Add new meta data field to Media Manager's Asset Preview's section 1.2 Adding a new label for a thorough guide on how to create a label).

In this case, a label already exists with a Constant "sAssetType" and Label "Asset type".

    12. Recycle the Media Manager website.

After doing so, refreshing Media Manager will display three filters:

2.2 Removing a filter

This is done by removing the filter from the search "DigiZuite_System_Framework_Search". You SHOULD also clean up the searches "DigiZuite_System_Framework_My_Favorites" and "DigiZuite_System_Framework_My_Videoes".