Format, Symbols, Build Symbols
Use Build Symbols to create Compound Symbols that do not match any of the predefined symbol templates accessible through the Compound Symbols toolbar.
To re-use the created new symbol you can copy and paste it into the User Symbols bar or even add it to one of the symbol palettes of the Compound Symbols Window.
To delete a selected item,
choose the Add Item tab, select the item
in the preview control, then choose Delete.
To add, change or delete parentheses, brackets or similar
symbols enclosing your symbol,
choose Parentheses / Brackets,
select the desired orientation, then specify the enclosing symbol of your
choice.
To change the size, alignment and position of individual
symbol items,
choose the Size / Align tab, and change
the desired properties.
To edit the entire symbol using Symbol Script,
choose Script.