Photoshop Keyboard Shortcuts
Command Z(Mac) / Control Z(Windows)
Command D(Mac) / Control D(Windows)
Regardless of your current tool, the Hand Tool
becomes active as long as the space bar is depressed.
Command, Space Bar, Click(Mac) / CTRL, Space Bar, Click(Windows)
Also on keyboard: Command + (Mac) / Control + (Windows)
OPTION, Space Bar, Click(Mac) / ALT, Space Bar, click(Windows)
Also on keyboard: Command - (Mac) / Control - (Windows)
Hold down Command key (Mac) or Control key (Windows)
Regardless of your current tool, the Move Tool becomes active when the key is depressed.
Use keyboard numerals to adjust opacity for brushes and layers
1 = 10%; 5 = 50%; 0 = 100%, etc.