Made with Rigify,
"Baby 2" - Rig has own panel with selection tools (and tooltips), Arm and Fingers Positions.
Fingers Selection: Ctrl-Click = Select and Insert Keyframes.
Awesome "Easy Select Bones" addon from Chichige-Bobo, is also included. Hotkey "Alt + Q" give us highly customizable selection Menu at Cursor.
How to customize Chichige-Bobo explains here: https://www.youtube.com/watch?v=LzAoO6-CmDE