Polygon
This window contains tools for the input of polygonal objects. Any polygon may consist of unlimited number of segments, it means lines or arches. Any segment is specified by the end point and the type. The end point of previous segment is automatically considered as the beginning of the following one. The segments are organized into the table "Geometry". Segment number 1 is the beginning of the polygon, the last segment has to be identical with the beginning.
Segments may be entered and edit with the help of toolbar on the left side of the table. Segment properties are organized in the window "Edit segment". The button "Add" inserts new segments to the end of the list, button "Insert" adds the segment above the active one. The polygon may be closed automatically with the help of the button "Close line".
The left bottom corner shows the polygon shape. The active segment in the table is highlighted by the blue colour in the polygon view.
Highlighting of the active segment