The frame "Edges" serves to input edges connecting the terrain points. Two options are available to define edges:
With the help of table: edges are defined in the table. Pressing the "Add" button opens the "New edge" dialog window; sequence numbers of the starting and end points are then specified and by pressing the "Add" button added to the table. An arbitrary number of edges can be defined in this way. The "Cancel" button is used at last to close the window. These edges can be further modified (in the dialog window) using the "Edit" button or removed with the help of "Remove" button (more edges can be marked in the table to remove them all at once - before removing, the selected edges are displayed on the desktop in red). Each change is immediately reflected on the desktop.
With the help of the mouse: this inputting mode is turned on by pressing a respective button on the horizontal bar. The following options are available:
Edges can intersect neither other edges nor earth grading. Only one edge can be defined between two points.