We currently do not have in-app purchase capabilities for Windows prioritized as a roadmap item for AEMM. In our research we found the number of users consuming magazine issues on Windows tablet devices to be very small. Would be interested to know if you have seen a large percentage of users on Windows devices. Typically we see most of our Windows users coming from internal distribution applications, such as a application designed for sales teams to use.

At the very least:Align Options: top-left, top-center, or absolute centerScale Options: fit-to-height, fit-to-width, fit all, specify percent, or noneCrop Options: would be determined by scale settingThese are the things that the average web designer can do with CSS.Another option would be: have an "advanced" which would just let the user enter the CSS that should be applied...