Help->QuickReferenceCard doesn't explain it well, but says Shift-Escape does something. It puts the keyboard focus on the tabs so the left and right arrows do what you want. (Tested in 16.) In 17 Early Adopter, control-tab might also work.
![Capture.PNG Capture.PNG](https://community.jmp.com/t5/image/serverpage/image-id/35838iD86F357E3B0FDAA0/image-size/large?v=v2&px=999)
@sheila_loring
Craige