Previous screen

Page Up or Shift+Enter

Page Up or Shift+Return

Next screen

Page Down or Enter

Page Down or Return

First page

Home or Shift+Ctrl+Page Up or Shift+Ctrl+Up Arrow

Home or Shift+Command+Up Arrow

Last page

End or Shift+Ctrl+Page Down or Shift+Ctrl+Down Arrow

End or Shift+Command+Down Arrow

Previous page

Left Arrow or Ctrl+Page Up

Left Arrow or Command+Page Up

Next page

Right Arrow or Ctrl+Page Down

Right Arrow or Command+Page Down

Go to page

Command+Shift+N

Previous open document

Ctrl+F6 (UNIX)

Command+F6

Next open document

Shift+Ctrl+F6 (UNIX)

Shift+Command+F6

Scroll up

Up Arrow

Up Arrow

Scroll down

Down Arrow

Down Arrow

Scroll (when Hand tool is selected)

Spacebar

Spacebar

Zoom in

Ctrl+equal sign

Command+equal sign

Zoom out

Ctrl+hyphen

Command+hyphen