While trying to export a Roadmap (Feature Roadmap for example), there is no way to chose the page layout like portrait/landscape nor is there any way to format the output like font size etc. So, when i have a huge roadmap spawning a few years, it actually prints it in portrait which is not very good for sharing or printing.
I have the same issue - exporting (png) a chart that is in landscape on the screen gives me an image in portrait, doesn't play nicely in powerpoint
It is not clear to me how having portrait/landscape options for image generation would help. When images are generated they come out in the natural size of the data. If your data is very wide then you can shrink the image proportionately to make it fit on a landscape page. If Aha! did that itself before generating the image you would get the same result - but would lose the flexibility to use the wider layout if you wanted to.