There are two print options (on the top menu, select File...)
One is "Print today so far" which is what you use to only print up to the current point in time.
The other is "Print" which will print the log grid as you have it shown on screen.
So if you go off duty at 7pm, and know you're done for the day, you can use the Print option (not the Print today so far option) and it fills out the whole log.