If you are a project manager, programmer, finance person, or just someone who uses spreadsheets a lot, this can greatly increase your efficiency in Google Sheets.

After installing, you can see and customize all of the keyboard mappings by typing "?" while on a Google Sheets page.

Here is a partial list of shortcuts, and their default key assignments:

Movement:

  j      Move cursor down
  k      Move cursor up
  h      Move cursor left
  l      Move cursor right

  <C-J>    Move rows down
  <C-K>    Move rows up
  <C-H>    Move columns left
  <C-L>    Move columns right

  <C-d>    Scroll half page down
  <C-u>    Scroll half page up
  g,g    Scroll to the top of the sheet
  G      Scroll to the bottom of the sheet

Selection:

  v      Begin selecting cells
  V      Begin selecting rows
  A-v    Begin selecting columns

Editing:

  i      Edit cell
  a      Append to cell (edit but, starting at the end)
  u      Undo
  <C-r>    Redo

  o      Insert a row below the cursor and edit it
  O      Insert a row above the cursor and edit it
  s      Insert a row below the cursor
  S      Insert a row above the cursor

  d,d    Delete the current row (or selected rows/columns)
  x      Delete cell contents
  y,y    Copy the current row (or selected rows/columns)
  y,c    Copy cells
  p      Paste

Formatting:

  ;,a,l  Align left
  ;,a,c  Align center
  ;,a,r  Align right
  ;,w,w  Wrap cell
  ;,w,w  Overflow the cell
  ;,w,c  Clip the cell

Other:
  ?      Show the help dialog
  ;,w,f  Toggle full screen
  ;o     Open URL in cell in a new tab