[DerekM]

Unfortunately we can't give an ETA on OmniOutliner 4 yet. It is coming though. You can try using the print scaling so you don't have to change the font size to print. To turn this on, go to File -> Page Setup -> Settings: OmniOutliner -> General tab and check 'scale to fit page width'. This will cause your file to print scaled to one page width so if you have your font size large and window width wide, it will scale down.