This feature allows you to add properties from the Onfly dictionary on objects of the model or in the edited family.

After clicking on the "Add Properties" icon, a window opens and allows you to select the objects that will receive the new properties.

One click on the "Choose properties" button then displays the list of Onfly dictionary properties, sorted by domains.

A search field provides quick access to properties that contain the words you are looking for.

You just have to check the properties you want to add in the selected object(s).