From SMTheming Wiki
Text commands allow the themer to control text rendering.
These commands are available in all StepMania versions since StepMania 3.9.
| ||Float||maxwidth,300||Sets the maximum width for the text. If the text width is over this, squish it to fit.|
| ||Float||shadowlength,0||Sets the shadow length of an object. (Also works on non-text objects.)|
| ||Integer||wrapwidthpixels,256||Sets the point at which the text should wrap. Defaults to -1, which means "expand forever".|