Im new to Sketchup but have used other vector based programmes. I have some issues with the 'Line Tool'. While drawing a line I understand that its exact length can be entered into the measurements panel but if I wish to alter the line length at a later stage, there seems to be no option. Usually (in other software) you could select the line and then click and drag on its end 'handle' to adjust it. Can anyone help??

while on the line subject, can a lines 'weight' or thickness be altered?