How do you activate a cell in Microsoft Excel?

To select a cell (If you are looking for the answer for an IT class.)

Click on the cell using the mouse, or using the arrow keys, move the cursor to the cell you want. You could also press the F5 key and use the Goto command to go to the cell that you want to be active. You could also type its address into the Name Box. The Active Cell will show a black box around it or if it is part of a range it will be the only white cell. You'll also see the address of the Active Cell in the Name Box, beside the Formula Bar, so that you will know which cell it is.