In xHighlight sometimes we need to select multiple parts together, to assign materials, transform, explode and so on, instead of dealing with one at a time. 

Multiple selections save lots of time when there are many instances to go through the same handling. 

E.g. the 7 screws shown below. I can ctrl click all 7 to select them all, but it's pretty tedious and time consuming. 

This video below compares single clicks and a box selection on the Assembly panel. 

The box selection is a huge time saver for me😄 since shift selections are not supported on the tree. 

Plus, remember other techniques shared before to make selections easier? Such as viewport box selections and selection sets. Enjoy.