Tool selection. Single letters switch tools inside the dialog: Z zoom, H hand, C crop, B remove, E edit, K a new brush mask, G a new gradient mask, T the targeted adjustment tool. Red Eye is Shift+E, not E.
Edit panels. Command or Ctrl with a digit jumps straight to a panel: Light, Color, Effects, Curve, Color Mixer, Color Grading, Detail, Optics, Lens Blur.
Masking. Bracket keys size the brush, Shift with a bracket feathers it, and the digits set brush density from 10 percent to 100 percent.
Point Curve. Arrow keys nudge the selected point by one unit, Shift with an arrow moves it by ten, and the Alt or Option digits pick the channel.
Rating and labels. Bare digits rate an image from 0 to 5 and set colour labels, which is what makes a filmstrip pass fast.
Merging. Panorama and HDR merges have their own chords, with and without the dialog.