If you have a large number of checkboxes into a HTML form then you will need a control-checkbox to mark or unmark all them at the same time, making the process easier to the user that fills the form. With this Dreamweaver extension, you can very easily introduce into your form a special checkbox that is capable of controlling several checkboxes, or even all checkboxes at once. This is a 100% visual process, you don�t need any hand coding, the extension generated the properly code into the page making the process easy for you.