Stretching multiple layout wires at once

I have been trying to stretch multiple metal 1 wires (pathSeg). (Cadence 6.18) 

I've tried selecting them all then pressing s, only they all just move instead of stretching.

Reading a bit on here I then switched to partial-selection mode with F4 but they all just moved instead of stretching. 

So I do not know how to stretch multiple wires- is this not possible with Layout suite L editor perhaps.