AndroOpen Office show context menu for cell selection automatically.
You can show context menu by tapping the cell.
<Each functions>
Cut : You can cut the contents of selected cell.
Copy : You can copy the contents of selected cell.
Paste : You can paste the contents of copied cell.
Edit : You can show software keyboard by tapping edit button.
More... : By tapping "More.." button, the following choices are indicated.