Close rectangle

Hi.  I'm new to LibreCAD.  I have drawn a rectangle, then modified it to the desired dimensions.  However, when I look closely, one corner is not closed.  I tried to Lengthen the short edge to no avail.  Any help would be greatly appreciated!

Hi Ltn

Select the line you wish to lengthen or shorten and drag the 'Blue' handle to snap to the required location.

Another option is to use Trim Two. This function will connect both ends but one thing to remember if you are wanting to move the line to match use previous reply other wise the trim two will length the lines to connect them together.