These aren't assigned to keys by default. To assign them, open Windows > Preferences > Hotkey Editor. Select "Custom Scripts" and expand zMayaTools, or select "Runtime Commands" and search for its name below, such as "zNextFrameOnTimeSlider".
Move to the next or previous frame, staying on the time slider.
Unlike the NextFrame and PreviousFrame hotkeys, these commands wrap around the edge of the time slider.
If "Frame stepping includes the frame after the time slider range" preference is enabled, the frame at the end of the time slider range is included.
Go to the first or last frame on the time slider.
zGoToMaxFrame is the same as the builtin GoToMaxFrame hotkey, with added support for "Frame stepping includes the frame after the time slider range". zGoToMinFrame is also included for convenience.
Pick walk, adding to the selection instead of replacing it.
These are useful to bind to shift-up/down/left/right.
Toggle wireframe on selected on and off (disabling "wireframes on everything" if active).
Toggle wireframes on everything on and off (disabling "wireframes on selected" if active).