Preferences

To open the JGraphEd Preferences Window, click on the Preferences Button, or choose Preferences from the File Menu.

The JGraphEd preferences window lets you customize some of the details or behaviour of how certain commands run:
Preference Description
Single Click To Add Nodes When enabled, nodes can be created with a single or double click in a blank area of a Graph Editor Window in edit mode.

When disabled, nodes can only be created with a double click in a blank area of a Graph Editor Window in edit mode.
Create a New End Node if a new Edge has only one Node When enabled, pressing and dragging the mouse on a non-selected node, and then releasing the mouse over a blank area of a Graph Editor Window in edit mode will create a new edge between the source node and a new node created at the position where the mouse was released.

When disabled, pressing and dragging the mouse on a non-selected node, and then releasing the mouse over a blank area of a Graph Editor Window in edit mode will do nothing.
Default for Drawing Canonical Ordering and Normal Labeling on Embedding When enabled, The default value for displaying the canonical ordering or normal labeling of a graph in a Graph Editor Window will be to display it after it has been straight-line grid embedded.

When disabled, The default value for displaying the canonical ordering or normal labeling of a graph in a Graph Editor Window will be to display on the current graph.
Draw Text Background on Top of Edges When enabled, the background of the bounding box around the label text for each node will be draw opaquely after all edges have been draw.

When disabled, the label text for each node does not obscure the edges, but is much harder to read.