When working in the Sizes and Grading pane and you select a single point, the Adjacent Edges section is displayed.
The table shows the length of the edge between the selected point and the closest corner points.
If the selected point is a corner point, the length of the adjacent edges is displayed
If the selected point is an intermediate point, the distance to the edge’s corner points is displayed
When you hover over a table cell, the cell is highlighted and in the 2D window the corresponding edge or edge section is also highlighted
The following images, when expanded, show the highlighting effect