What is the fastest way to add a marker in Premiere Pro?
Press M with the playhead at the position you want. Shift+M jumps to the next marker and Ctrl+Shift+M (Shift+Cmd+M on Mac) jumps to the previous one, so you can navigate a sequence by markers alone.
Are Premiere Pro keyboard shortcuts the same on Windows and Mac?
Mostly, following the usual Ctrl-to-Cmd and Alt-to-Option pattern. A handful of marker-clearing and frame-nudge shortcuts genuinely differ beyond that pattern, Mac uses Option alone where Windows stacks Ctrl+Alt or Ctrl+Shift for the same action.
How do I switch between Timeline, Program Monitor, and other panels without the mouse?
Shift+1 through Shift+9 jump focus to a specific panel (Projects, Source Monitor, Timeline, Program Monitor, Effect Controls, Audio Track Mixer, Effects, Media Browser, Audio Clip Mixer, in that order). This works identically on Windows and Mac.