Default Customer for Orders - System Option

X>Utilities>System Options>Order Entry>Order Entry 

Category-Default Values

Type- Can be Global, Assigned or User

For cash & carry business, the default customer should be set to a "Cash & Carry" customer added to the customer file.  When adding the "Cash & Carry" customer to the file, be sure to indicate a default sales representative that would normally get credit for the sale (i.e., House).

To Clear the Value, Clear Value for Tagged Users.

The Select User field can not be used to Clear a value. Change Value must be clicked
and the user tagged.