Make Dir same for all curves selected in one quick way?

Hi,
v5.
any way of making Dir same (not bothered left or right) for all curves selected.
and maybe, a luxury, choose direction ?

when sectuining mesh I dont want to be spending time clicking on those that have wrong direction.

and why is it that 20 lines projected to a mesh, made at same timem on a face of an item, see Dir both ways ?

Cheers

Steve