I design a lot of school books. I frequently need to use dotted rules under all lines in a paragraph, where children can write down their own answers. These answers are already filled in with the correct answers for the teachers in a spot color. The students gets books without this spot color printed. This to clarify why I would need this. Until now the only solution I could find was to end each line with a paragraph end. But this is not very user friendly, especially when this answer-text needs a revision