# GRPH Editor: Editing Modes

When using the Graphical Editor, there are several modes. Two of these modes are for editing existing DES elements, and the remaining are for adding elements to the DES.
The first editing mode is Selection mode . It is used for selecting and moving components of the DES.
The second is Transition Shape Editor mode It is used for adding or moving inflection points on a transition line or curve.

To enter either of these modes, click on the appropriate button in the toolbar:

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