Ctrl Shift sub select for polylines

Is it possible to sub select a line in a polyline? I want to be able to resize rectangles the same way I resize polysurfaces.

Or another option would be to use edit points - is there a way to turn all edit points on in a document permanently?

Hi Gavin- this will work in V6… but does not in V5. There is no way to turn on edit points permanently, no.