I want to set the dimensions of an active system box or active (used as a background) to the dimensions of a paragraph of text. When the next paragraph is displayed, the background should resize itself to the length and width of the text.
I've tried using an asb with dimensions set to len(string)/? but no luck when there are line breaks in the text.
However I've also found another way - you can resise the ASB to the size of the string, but only if you change the string paragraph at the same time you set the text in the ASB. Go figure... primitive, but still no extension required.