Double click inside a cell to start entering data.
To navigate around the table you can.
- ENTER : Move to the next row
- ENTER + SHIFT : Move to the previous row
- TAB : Move to the next cell
- TAB + SHIFT : Move to the previous cell
- CTRL + C : Copy
- CTRL + V : Paste
If you wish, you can start from an empty table or copy the data from a spreadsheet.