Clarabirch

Recently upgraded to basic Vworks 2012. Trying to create 3D model which is fine until I want to add 3D plant symbols to an isometric view . There are a few trees in the Resource browser but I'm unable to find shrubs. I've tried importing plant images from Vectorworks Libraries but these plant symbols are appearing only as x y frames (if that makes sense) they are graphically invisible. Any help on what I'm doing wrong would be very helpful.

A simple click and it's all sorted - thanks so much! Switched back to Top/Plan in Standard Views.

I have accidentally turned my layer from 2d into 3d mode (3d cube symbol appears next to layer name in toolbar and walls drawn in plan have turned into 3d wireframes) Tried undo function but it doesn't go back far enough. Any ideas how to revert layer back to 2d?