: Use the Two Points tool to click a start and end point.
: Choose Center, Point to define the middle and then the radius. User Manual for LibreCad 2.0
Precision is what separates CAD from a standard drawing program. The toolbar (usually at the bottom or left) allows your cursor to "magnetize" to specific points: Snap on Endpoints : Grabs the very end of a line. Snap Center : Grabs the middle of a circle or arc. : Use the Two Points tool to click a start and end point
: The "brain" of LibreCAD. You can type commands or coordinates here for extreme accuracy. User Manual for LibreCad 2.0