Drag one or more property columns to the grouping row. The objects are grouped according to the order of properties in the grouping row, from left to right.
In the Organizer Settings , the grouping row is always available. To open the Settings , click in the upper-right corner of Organizer.
When you group object properties in the Settings , the grouping is simultaneously shown in Object Browser if the grouping row is visible.
In the example below, the first grouping level is Name , the second level is Material , and the third level is Profile.