Scale type to fill text frame
When preparing newspaper or newsletter style layouts, it's quite common to scale headlines to fill available space.
It would be great if there was a way to automatically fit type to the frame it resides in, by scaling font size. I'm sure this would be very useful for data merge scenarios too.
@Maik, it's not the same thing. Scaling text (with a fixed leading) would allow to create multiple documents (i.e. data merge) without having to resize them one by one. It would allow styles in which you can change the text without changing the area it covers, essential for many titles.
Alternative: change the text frame's size by dragging with the mouse while holding Ctrl key. This will scale the text to the text frame.
Rob Wood commented
It would also be useful to set a Paragraph Style to be a percentage of another style's size (and for leading to be set as a percentage of font size rather than an absolute)