Posted by LordOfBikes on Nov 28, 2014; 10:12am
URL: https://forum.librecad.org/Issues-with-Rotate-Select-Layer-Specifying-length-of-line-tp5710679p5710772.html

Concerning your 3rd point:

a) use measuring tool from menu Info -> Distance Point to Point
    or the Ruler/Dimension icon from left tool bar to show Info tool bar
        and activate Distance (Point, Point) tool
    then click start and end point of the line and find the dimension in the command history box
    use snap to endpoints to be exact

b) use plugin List Entities
    from menu Info select List Entities
    Selection tool bar becomes active
    select one or multiple entities
    click on Continue action arrows from Selection tool bar (Enter may not work yet)
    a new box is opened where all selected entities are listed including length of lines

Armin