I've been scratching my head over this one!
I have a simple ArcGIS Pro project with an orthophoto - when I go to the Share tab and click on Layout in the Export group I can specify the file name, file type, resolution, other export options, and image quality. See the attachment export_with_resolution_etc.png
However, I have another project that has many orthophotos, a digital terrain model, and some polyline shapefiles. When I go to the Share tab and click on Layout in the Export group I can only specify the folder to export to! The options for file type, resolution, quality, etc, are not present, and the output is a low-resolution PDF. See the attachment export_no_resolution.png
What am I missing? Is this my user error (I've only been using ArcGIS Pro for a couple of days)? Or is it a bug?
Many thanks and kind regards,