Use opposite toolbar buttons to make room for more customized buttons

One of the more undocumented features in Excel is hidden toolbar opposites. Although not every button on the Standard and Formatting toolbar has an opposite, many do. How does it work? When you press the SHIFT key and click on a button that has an opposite, the image on the button changes. Release the Shift key and the original button image displays. The following is a list of the opposites for buttons on the Standard and Formatting toolbars:
- Open - Save
- Print - Print Preview
- Sort Ascending - Sort Descending
- Underline - Double Underline
- Left Align - Right Align
- Center Align - Merge and Center
- Increase Decimal - Decrease Decimal
- Decrease Indent - Increase Indent
- Insert Rows - Delete Rows
- Insert Columns - Delete Columns
- Paste Formatting - Paste Values
- Clear Contents - Clear Formatting
- Trace Dependents - Remove Dependent Arrows
- Angle Text Upward - Angle Text Downward