Hi,
When I'm working with an assembly, is there any way to "lock" the assembly tree on the left so that it does not expand every time I click a part to move it around the assembly? I've attached some pics below to make it a bit clearer. It's annoying to have to manually contract my tree once again so that it isn't pages long every time I'm done moving a part/sub-assembly around. Thanks.
Go to Tools > Options > System Options > Feature Manager and de-select the Scroll selected item into view option.