I want to print 300 tickets with unique sequential ticket numbers. I have three tickets per page. Is there any way to automatically do this?
I do tickets using a number list generated in Excel and saved as a text file. You can do it in a number of ways.
Simplest is to set up the master page with three linked text frames to hold the number, and define a paragraph style with a keep option to start each paragraph in the next frame, then use File > Place... and autoflow the text.
You can also set up Data Merge templates (either for a single record per page, which requires three numbers per record for three-up tickets, or for a multiple records per page merge, which would use a single number per record) and do the tickets that way.
If you google, you'll no doubt find several previous threads where this is discussed in great detail by me as well as several other users.