===Define the Primary field===
The Primary field, and indeed all controlling custom fields, must be either a [[Custom Field Type: Select Many – Check Boxes|Select Many – Check Box]] or a [[Custom Field Type: Select One – Combo Box|Select One – Combo Box]]as these are the only ones with finite number of pre-defined options.
* Select the relevant custom field and click on the Apply button. The field name will now appear instead of the Primary Field text.
[[Image:Dynamic Field Visibility 6.png]]
===Define the branching===