De/in-crease linetype scale for entities

Is some simple way how to de/in-crease linetype scale for entities? Or set own linetype scale only for Xrefs.

I do not think now commands LTSCALE, CELTSCALE, PSLTSCALE, MSLTSCALE.

I mean something like current linetype scale * 10 or current linetype scale * 0.1, etc...

My blocks, linetypes etc. is all make for linetype scale 1, but if I receive drawing for Xrefs, which entities have one ltscale 10, another enties 0.004, another 0.5 etc... I can fit to "nice view" direct LTSCALE in my drawing, but it look not "good" for my drawings especially in the blocks.