如何使用AX代码选择报表设计版面？

I've been modifying a Report design in AX. This design has three layouts, each layout has different sizes. So when the user wants to run the report and wants a specific size, he can just select a predefined size via a drop-down list and I will then use that as a parameter to call the the specific design layout. I've been modifying a Report design in AX. This