On the Recent Usagetab, click the Favorite Resources cogwheel. The Recent days popup appears, with the Favorite Cabinets drop-down at the bottom of the window.
Click the Favorite Cabinets drop-down menu to see the list of resource cabinets.
Check the box in front of the resource cabinet or cabinets you want to select as favorites.
Click outside the drop-down menu to save your choices and add them to the Favorite Resources panel.
The Favorite Resources panel updates to display the Resource Cabinets you selected as favorites.