Green Lines in Edit mode

Does anyone know what the green lines are in edit mode - obj from 3ds…

The cyan coloured edges mean that they are marked sharp.

Thanks…I probably need to model it again…is there anything else I can do?

What is your objective?

Mark sharp is used to mark areas sharp on a smooth mesh.

More thanks – I’m thrashing around a bit with Blender at the moment and importing all my 3ds work as obj’s ……and finding out the problems……