Change Billboard size in Landscape splines

Hello, I’am working with Landscape splines and because I have very much of them close together, it worries very much, that the Billboards are so big. Is it possible to make them smaller?

Thanks, Jojii.

This is not ideal, but the way I currently work around it. Change half width to 100 from 1000. then adjust scale of mesh as nesc.

I would love to see an option to adjust billboard on the landscape tools tho. Pain to work with sometimes.