Extensions are just script files that are run at startup. Then they wait for an event to occur. The event can be a selected menu item, or a button clicked on, added by the extension.
Create all extensions using the Quickbar => User Scripts tools. For more information on how to create an extension - please look in the program help.
Here are two simple extension demo's you can try out.AddMenu
This one adds a new menu to the program. The menu items just display a simple message box, but it may give you an idea how to create a new menu or new menu items.
AddMenu.zip [1.1 KiB]
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This demo adds a new page in the sidebar at startup. It contains of a drop down list and a listbox. Selecting an item in the drop down list, will change the contents in the listbox. Selecting an item in the listbox, will just show you a message box.Add an extension to the program
Open "Addons => Extensions" and click on the button "Import from file...". Select a downloaded extension. The extension must be in a ZIP-file.
You can also add extensions from "Addons => Addons online", if available.
Don't forget to restart the program after you have activated an extension.