Working with Objects
Grouping and Ungrouping Objects
You can combine several objects into a group to treat them as a single one. For example, you can group a table with objects laying on it in order to move them together.
In order to group objects, you must select them. Tap on a first object to select it. Place and hold a finger anywhere on the screen (this can also be the selected object). Then tap on other objects that you want to select. Long press on any of the selected objects to bring up the context menu. Then choose the Group command.
To ungroup objects, bring up the context menu as described earlier. Then choose Ungroup in the menu.
A group of objects is represented in the Project Tree as a single item with subitems.
Nested grouping is also supported. You can group either separate objects or a group with another group. When you ungroup the bigger group, objects in a nested group will remain grouped. For example, you can group a lamp with a table. This group can then be grouped together with a chair. After ungrouping the overall group, the table with the lamp will remain grouped and the chair will be separate.
To combine objects, you can also merge them using the Merge command from the context menu.
Merged objects become one regular object. Unlike grouping, merging is irreversible. You cannot split merged objects unless you apply the Undo command.
You can apply the Merge command to a single object.
No matter whether one or several objects are selected, the command will merge parts of object(s) with the same material applied. Such parts will be turned into a single bigger part. The command will not change the object appearance.
Merging is effective for objects that contain identical details. For example, a 3D model of a tree can be created by duplicating the same leaf many times. This tree will be rendered faster if you merge its parts rather than group them. Merging is also preferred if the objects you wish to combine have the same material applied.
If there is a chance that you need to separate objects, or arrange them in different ways and combine again, use grouping.