How to choose between different types of designs in the same report according to user's needs in Dynamics AX

If you want in the same report  to build two different types of designs according to the user's need , you can create two designs or even more and to switch between  call "element.design(<design name>)" in "init" method of report.

For example according to the choice of the Printer, you will display the design called "EPSON" or " STANDARD"