Hello,
yes, you can scale the framebuffer content to the display size on systems using OpenGL ES 2.0. This means, that the framebuffer with a certain size will be mapped to the display size. Usually the scaling takes care that the aspect ratio is kept - but it is also possible to make a scaling with different factors in x and y direction so that the framebuffer exactly fits into the display. As a result, a circle will become an ellipse.
However, there is no separate feature to define the pixel aspect ratio within Embedded Wizard, because it is not possible to make such corrections on MCUs and many MPUs. Furthermore, the scaling of pixels may produce unsharp results.
Best regards,
Manfred.