It seems like you're looking for a photo viewing app on Windows that automatically adjusts the orientation of pictures based on whether they are landscape or portrait to maximize the size of the picture on the screen. While there isn't a native Windows app that offers this specific feature out of the box like some Android apps do, there are third-party photo viewing apps that may provide similar functionality or enhanced viewing capabilities.
One popular photo viewing app for Windows that offers advanced features is "IrfanView." Although it may not have the exact auto-rotation feature you mentioned, it provides various viewing options and supports a wide range of image formats. You can manually rotate images within IrfanView to fit the...