Keyboard shortcut to convert a Line to a Contruction Line?

[titaniumapple]

Hi, I'm constantly making Lines then wanting to turn them into Construction Lines.

The only way I've found to do this is to select the Line then go to the box to the left and click on the tickbox 'For Construction'. Obviously this is incredibly time consuming over hundreds/thousands of times I need to do this - is there a keyboard shortcut to convert a Line to a Construction Line when the Line has been selected?

Thanks!