1. Click on the top-left rectangle above the row numbers and to the left of the column names so that all of the cells in the worksheet will be selected.
2. Move the mouse over the line between two column names (column headers) and double-click it. This will AutoFit all of the columns in the worksheet.
3. Move the mouse over the line between two row numbers (row headers) and double-click it. This will AutoFit all of the rows in the worksheet.