# GRPH Editor: Editing Modes

When using the Graphical Editor, there are two editing modes.
The first is Selection mode and is used for working with a DES and its components.
The second is Transition Shape Editor mode and is used for editing a transition shape or more specifically, the shape of the graphical representation of a transition.

To select either, mode click on the appropriate button on the toolbar so that it it is enabled.
Selection Mode
Transition Shape Editor Mode

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