Fill Down -- copies the content of a cell to all highlighted below
Shortcut: Control + d
Then, press "control" + "d".
Fill Right - copies the content of a cell to all highlighted to the right.
The procedure is similar to fill down.
Shortcut: Control + r
Fill up a selected range of cells
Copy content of a cell after you enter to a selected range of cells.
Shortcut: Control + Return
1. Highlight a range of cells
2. Enter the content
3. press "control" + "return"