To modify all rows or columns at once, you can change the size of every row and column together. This saves time compared to resizing them individually. You can set the same height for all rows or the same width for all columns in your worksheet.

Here’s how to set a uniform row height:

1. First, click the Select All button. This button is located just below the name box. It will select every cell in the worksheet.
   
   
   
2. Next, move your mouse over a row line. When you do this, the cursor will change into a double arrow.
3. Click and drag the mouse to increase or decrease the row height.
4. Release the mouse when you're happy with the size. The row height will now be the same for the entire worksheet.