When you are in the visual schedule builder (VSB), looking at the Shift tab, the top menu option on the upper left is your Staff Pick List (SPL):
Whenever you click on a shift on the canvas, the SPL will immediately update to show you the availability and credential information for all your staff, grouped according to roles:
The staff will be sorted in order of seniority, but if you have a lot of staff finding a particular person may require a lot of scrolling.
At the top of the SPL is a quick filter search bar. Click on that and start typing the name you are looking for and the SPL will find all the matching names, still organized by their roles:
To clear the quick filter, simply hit your Esc key and the SPL will return to normal.
Pro tip: To save time you can open the SPL quick filter by using the keyboard shortcut Ctrl + Shift + S to enable search, then click S again to focus on the SPL.