- Click Global > Cross-Frame in tasks panel to open Cross-Frame panel.
- Select the sub menu popup direction. In the sample, it is set to Left to right.
- Fill the left frame name "left" in the navigation frame box; and main frame name "right" in popup menu box.
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- Publish the menu into the navigation frame, that is the page where the menu shows. Click the button "Publish > View/Copy Code" to publish the menu into the page.
- Save the frameset page and preview the menu crossing frame to show its popup menu.
Note: To edit the menu again, just open the .pgt file of the menu in the program and click the button "Publish" to publish the menu again.