Brush controls panel (General or All)

Command + B

Ctrl + B

Colors

Command + 1

Ctrl + 1

Mixer

Command + 2

Ctrl + 2

Color sets

Command + 3

Ctrl + 3

Layers

Command + 4

Ctrl + 4

Channels

Command + 5

Ctrl + 5

Clone source

Command + 6

Ctrl + 6

Navigator

Command + 7

Ctrl + 7

Patterns

Command + 8

Ctrl + 8

Papers

Command + 9

Ctrl + 9