The built-in Xojo reporting does not have variable row heights. It’s been a requested feature for years.
We make a reporting tool called Shorts that has a lot of nifty features like variable row height, drop-in report designer and viewers, export to PDF, HTML, and CSV, external report files and much more. You can find out more about it at http://www.bkeeney.com/allproducts/bkeeney-shorts/. It comes as unencrypted Xojo source so you can modify as you see fit (and are inclined to do so).
No matter, thank you. Even I appreciate the fact that provide open sources, it’s still too expensive for my project and the feature that would make it nice - creation of PDF documents - needs another third party plugin purchased.