I want to change the character's height. but scale will make it looks bad.

What character? Taller or shorter? Change the y-scale for the neck(s), chest, abdomen, hip and one sides leg parts. Change the same sides arm parts in x-scale. Then apply to the other side using Figure/Symmetry/. Someone will probably be along in a moment with preferred proportions.

thanks. but when i scale the chest, the breast has some problem. I need to make her shorter but not smaller. so has some problems. is there some morphs and parameters about the height?

Try under figure, figure height, there are some general settings.

What character? What problem? At the bottom of the page is a [Search] button. I exercised it and found the following (paste the ShowMessage=ID into your URL field, I can't be bothered with knowing how to put multiple links into a post): ShowMessage=706643 ShowMessage=1208781 ShowMessage=1110158 ShowMessage=1364607

umm, 'can't be bothered with' = joke

Well Iif you want to make V3 shorter, select body, then scale her down from 100% to something less (this makes the whole figure shorter but the head disproportionately small), then select head, and scale it up to something more than 100% unti lshe looks proportionally right. Love esther

Also note that in real peple, height is often more a matter of proportions of the different parts of the body, than of everything being larger or smaller. (Some people can be short, but long-waisted, for example.) Experiment with just scaling the Y-axis of the thighs and shins. (You might need to adjust the arms accordingly as well to avoid "gorilla" proportions.) Neck length and abdomen length are also good candidates for fiddling. By making small adjustments to several parts, you can get a good effect without distortion, and create a more unique look for your figure to boot.