To delete a field from a quote
Place your cursor
on the table heading of the field
you wish to delete. For example, if you wish to delete the "Open"
field, position your cursor as shown below:

Right-click to display the context menu, and select Remove field.
You may also delete fields by accessing the quote's properties.
Position your cursor anywhere on the table, and right-click to display the context menu.
Choose Columns, then choose Customize.
Select the field
you wish to remove from the Selected Fields list, then click Remove.

Click OK to save your changes.