I posted a similar question recently, wondering how you make the text wrap to a second line. The answer, I discovered, was to use an external text editor that would include the control characters for wrapping text. This can also be done by adding control-enter' into your text. I suspect you could do the same, adding the control characters to change the size, font and position of your text, but it is not a feature of Lr, it is a work-around that pulls in some text editing characters that Lr will recognize.
Fundamentally, Lr is quite weak in this area. Which as you note, seems quite odd coming from Adobe.
