I am using JasperReport Studio 6.20.0 , JDK 18 on Windows 10 pro x64. How to have blank A5 landscape paper size?
There is no builtin template for A5 paper size.
What you can is to start with Blank A4, then select the report/root node in the Outline, go to the Properties view, click Edit Page Format at the bottom and choose A5 as Page Format.