I've added the copyright permission block to the ACM alternative style template as described here.
The total permission block spans 10 lines at the bottom left hand corner and the spacing looks fine.
But when I add the DOI to the permission block, making it 11 lines, there is no space between the start of the permission block and the last line of the paragraph in the main text in the bottom left.
I have tried several alternatives, how do I add a horizontal line space (\\) to separate the main text from the permission block?
\documentclass{...}and ending with\end{document}.A suggestion: Do us a favour and change your username to something more telling than "user1234". – Martin Schröder May 01 '15 at 09:04