Combines two or more selected objects into a single one. Objects to combine must be of the same type.
How to use
1. Click the Combine icon or choose the Tools > Transform > Combine menu command.
2. The program console prompts Pick objects to combine.
3. Pick the objects you want to combine in any view.
4. You can pick as many objects as you want. To end objects selection, press Spacebar.
Note: Combining is different from grouping. Combining allows you to put different entities in the same object. Only entities of the same type can be merged (curves with curves, surfaces with surfaces, etc.) with Combine modeling tool. Grouping allows you to group different objects together, so that, you can apply transformations as to a unique object. Nonetheless, grouped objects are not really unique objects; in fact groups cannot be used as source objects in an action (i.e., you cannot trim a group of surfaces, but you can apply the same action to combined objects). Objects of different types can be grouped.
Options
Remove
To remove a component from the combine object.
Modeling Tool panel. Choose the component of the merge object you want to remove from the list. Press the Remove button.
Insert
To add a new component to the combined object.
Views / Modeling Tool panel. Switch the Insert check button on and pick the new object you want to include in the combined object.