You can edit contents of a cell by:

Answer 1

1. Double-clicking on the cell to enter edit mode
2. Pressing F2 on your keyboard to enter edit mode
3. Selecting the cell and then clicking on the formula bar at the top of the worksheet to edit the content
4. Right-clicking on the cell and selecting "Edit" from the context menu
5. Typing directly into the cell if it is not a formula.