Cutting and joining is vitally important when you're trying to build interesting artwork and there are a number of different ways and tools that we can use for this. We're going to look now at some of the cutting tools first.The first tool is in with the Erase tool. It's called the Scissor tool. This tool allows you cut a path by clicking on the path with a tool.
Click on the path to create a cut and then do the same on the other side of the shape. You can now use the selection tool to separate the 2 shapes. This tool then leaves you with an open path.
Click path on one side then the otherClick path
Deselect and Reselect with Selection Tool
The next tool is the Knife tool. It cuts up objects in a more freehand manner. Just select the object, then starting outside the object, drag the tool across it finishing outside. Deselect the object, and using the Selection tool, select one of the shapes and drag.
Deselect and reselect using Selection tool
You can keep drawing to break up the shapes as many times as you like.
As before, deselect and select with the Selection tool to separate:
Multiple lines separated
If you want to create a straight line, then hold down the Alt key before you start to draw. Now once you've got your straight line going you can then hold down the Shift key to constrain the angle to horizontal, vertical or 45 degrees. It will just snap to these angles.
Straight lines selection
Finally, you can of course break up a line, but just selecting individual points with the direct selection tool and deleting them.
Pen tool shape
Using backspace to delete selection
Here I have selected the top point of the circle. Then hit delete.
Top points of circle selected