Fold Settings dialog box
Insert > Text > Script > Script Wizard Effect – Navigation menus – Expanding navigation menu – step 3
Menu item list
Shows the hierarchical structure of the menu constructed in the previous steps.
Fold
If this option is selected, the menu will initially be fully collapsed when the document is loaded in a browser.
Expand
If this option is selected, the menu will initially be fully expanded when the document is loaded in a browser.
User-defined
If this option is selected, you can individually control which nodes of the menu will be initially expanded or collapsed. Use the +/- icons next to each node to expand or collapse it until the menu tree looks the way you want it to look when the document is loaded in a browser.