Selecting and Arranging Objects
Group and Expand Objects
Group or Ungroup Objects
Grouping objects lets you combine them into a single piece of design. Then it can be moved, rotated and resized as is was a single object. Some other manipulations like adding Fill and Stroke, or applying distortion are also possible. This may be useful if a part or the whole your design is created out of several primitive objects, and you don't want it fall apart when you move or rotate it. For example, you can create a keyboard as a number of keys and the body. Then you group them together to have the keyboard as a single unit.
The item in the Layers panel that represents a group is named Group by default. You can click on the triangle near the group name to access the grouped objects.
A group can include another group. In this case we say that groups are nested.
To group objects, select them. Then right-click on any of the selected objects and choose Group.
To ungroup, select the group, right-click on it, and choose Ungroup.
The Expand command turns an object into a number of typically more primitive objects. Those objects together look exactly like the original one. This kind of "disassembling" of an object lets you use tools that can work only with the whole object but cannot work with its parts.
The following image shows as an arrow with stroke and gradient fill can be expanded into two objects: an arrow with gradient and the arrow outline. By further expanding of the outline, you can get two filled shapes. All created objects were manually moved apart for the illustration.
The result of expanding is either a group or compound group. After the first step in the example above, the outline and gradient are grouped. This is the most common case. When you expand the outline, you get a compound group that includes two solid shapes (one over another) with the Boolean operation Subtract applied.
When a new object should be created as the result of interaction between several objects, the program creates a compound group instead. The compound group consists of the original objects. This means that you are still capable to modify these objects and therefore update the result. For example, we created a hole in a shape using the Subtract operation. Now the original objects are inside the compound group which can be operated mostly like a regular object. But at the same time, you can reach the original shapes using the Isolation mode or the Layers panel, and change the location or size of the object's body or whole.