To customize this field, create a CSS style titled FIELD-SEARCH-ASC-DESC. The form button generated by this QuickCode Tag will then inherit the attributes of that style. 
For example: To make the quantity field 20 pixels wide with red text, add this style to your CSS rules: 
<style type="text/css"> <!-- .FIELD-SEARCH-ASC-DESC { 	color: #FF0000; 	width: 20px; } --> </style>
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