The Sketch Solving Status dialog box
appears. It indicates the overall status of the sketch geometry. In this case, the sketch
is under-constrained.
On the sketch as well as in the tree, under-constrained and over-constrained
geometrical elements (lines, points, etc.) are highlighted, and
iso-constrained elements are displayed in a different color. This enables
you to see easily which items are under/ over-constrained, and which are
iso-constrained.