If you're following on from the last lesson, you'll already have First Quarter Sales and Profit-4 open. But if not, open it, by clicking the Office button: Open: First Quarter Sales and Profit-4, from your Practice files folder. First thing we're going to do, is to select an entire column, column A. And to do that, you hover over the button that has 'A' written on it, in the column header, until you see a black Down Arrow. And click the left-mouse button, once. Notice that, when selected, the column is slightly shaded. And a black line has appeared around it, to show that, all of the cells in that column, are selected. Now, we're going to bold-face all of the values in the column, by clicking the Bold button, in the Font group, on the Home tab. And notice that every single value in that column, right down to row a million, will now be bold-faced. If you were to type another value in later on, that too would be bold. We'll now select column: A, once more, and click the Bold button again, to take away the bold attribute off all of the text, in column: A. Selecting a row is exactly the same, as selecting a column. If I wanted to select row 5, I would just click on the header, and the whole of the row would, then, become selected. If I want to select two adjacent columns, for example, columns: B and C, I start on column B. Hold the left-mouse button down, and drag to the right, to select both columns. You can select any number of columns, in this way. And I can do the same thing with rows. If I want to select several rows, I just drag down them, with the mouse. When you want to select several adjacent columns or rows, it's often useful to use the Shift key technique. To do this, click column: B, hold down the Shift key, and click column: J. And you can see, that we've now selected all of the columns, with two clicks, rather than having to drag. We can do the same with rows. Select row: 2, hold down the Shift key, select row: 20. Sometimes, you'll need to select non-adjacent rows or columns. For example, supposing I wanted to select columns: B, D, F and H. To do that, I'd select column: B, hold down the Ctrl key, on the keyboard. And then, click the other columns I need selecting. And I can do the same thing with rows.