Marion, welcome to the Family Historian community.

You talk about Reports, but then describe boxes, so I wonder if you mean Diagrams.

You don’t say whether they look OK on screen, and only a problem when printed on paper.

Are you using the Family Historian Sample Project to produce the displays?

Exactly what commands are you using?

I am sure it is simply unfamiliarity with the product but screenshots of the problem would help us understand.

It is awkward to attach images to these Emails so I suggest you join the FHUG Forums where attachments are so much easier.

See https://www.fhug.org.uk/forum/ which is free to join and use with many other free resources such as Knowledge Base and Downloads.