# Expected Line Segment

Use the Expected Line Segment area of the Settings tab to shape the line segment on which the Calipers operate.

Feature | Description
--- | ---
Selected Space Name | Names the coordinate space for the input image
Select Mode | Determines whether the expected line segment is determined by the 2 Points method (two [x, y] coordinates) or by the Point/Length method (a starting [x, y] coordinate followed by a line length and a measure of rotation).
Start X and Start Y | Names the starting (x, y) coordinate of the expected line segment
End X and End Y | Names the ending (x, y) coordinate of the expected line segment when using the 2 Points method.
Length and Rotation | Controls the length and angle of rotation of the expected line segment when using the Point/Length method.