Watch this video to learn how to use the Chromebook trackpad from How Tech!
The Chrome book is a unique device with some new terms and keys that you might not be familiar with:
Zoom In: CTRL & +
Zoom Out: CTRL & -
Bookmark a Page: CTRL & d
Full Screenshot: CTRL & 
Partial Screenshot: CTRL & Shift & 
History: CTRL & h
Paste: CTRL & v
Cut: CTRL & x
Copy: CTRL & c
Undo: CTRL & z
Redo: CTRL & Shift & Z
Caps Lock On/Off: Alt &
Increase Brightness:
Decrease Brightness: 
Rotate Screen 90 degrees: CTRL & Shift & 