Assume that I have a composite shape, after inserting it from the library. I want to hide another shape from that shape. I couldn't find a way to do that. I get get the collection shape as a node list, but couldn't find a way to hide an element from that same shape.

It's really simple to do that. All shapes and custom paths have a Visible boolean property. If you set it to false the shape/custom path will not be shown. If you have a composite shape the paths it is composed of are stored in its Primitives collection.

Best Regards,
Nevron Support Team