When you click the Create Content button on the Add Content page, you navigate to the Create Content page.

Use the Create Content page to select a custom content region that you have already defined in JDeveloper, and want to include on the list of predefined content regions on the Add Content page. Be sure to enter the region's ID and title, and the full name (for example, /com/mine/ext/MyTableRN). It is a good idea to add a description, which will provide useful selection information. When you select Apply, the Add Content page will appear, with this region added to the list of available content regions.