Use groupings
You can group model items and then handle them as if they were a single object.
Select the model items you want to group.
Click the Start tab bar if not already selected.
Click
Group/Ungroup > Group. The selected model items are combined in a group. The 
handles are placed around the grouping.
To select all items in a group, click one of the previously independent items. You can now move them all together, for example.
You can ungroup grouped items by selecting the group and clicking Group/Ungroup > Ungroup.