Trading suggestion

I know it's simple - and may have been done already (forgive me if so),,,but here's something that is a pain...

When trying to sell back large quantities of crafting materials - it's a real pain to do it 10 at a time. Can we do a thing where we can set in multiples, kinda like we do when purchasing from a trader? It could be multiples of 10, of course....

Thanks for the consideration...

I was under the impression when you sold any stackable you could change the number that you were selling.

When selling to a regular merchant, yes - but not when selling to the materials trader (unless there's a secret to it that I'm not aware of) - it's always just in individual lots of 10...