I'd like to lock in the collapsed view items in the design tree. Manipulating an assembly by grabbing a random part expands the tree to show the part. Many time I don't care about that part I'm just moving things around. If an item were wanted and was locked, the tree would highlight the parent point. And, should I want to unlock it I can find it. For example; I have a leaner pattern part in an assembly, I touch it to move my assembly, the design tree barfs open one hundred parts and now I have to find the collapse arrow and reclose it to find the rest of the design tree or collapse all from left click. The present design tree is a time suck and very poor work flow.