I am looking for a way of using the GG edge slide feature to move multiple verts/edges with different normals, all in the same direction. Attached are some screenshots of the issue... I would like to move all the edges/verts highlighted up the angle of the faces above them (see red arrow), but need them to retain their own angles. If I select them all and GG to slide, they all slide off in their own different directions, if I choose to move them in the 'Normal' axis, the axis is not the desired one due to them having different normal directions.
The only way I can find to do it is to just move edges with the same normal direction, but this then involves multiple selections and edge slides, surely there is some way of doing them all at once?
Many thanks in advance.