I'm creating a wizard with multiple steps and quite a lot of data to fill in. In one of those steps the user has the possibility to drill down to another screen, let's say options. He doesn't need to fill in this screen, it can be informative but in most cases he will be able to fill it in. This screen has to be part of this specific step in the wizard (as the client wants it so and because in another step the user can also drill down to the same screen).
I'm not sure what is best practice for how the user should be able to navigate once he arrives in this drilldown screen:
Would the user be able to still navigate through the steps in the wizard or does he have to go back to the main step to do so? I can't find examples of this immediately.