Latest Beta of Rhinoceros5 has the option of choosing any resolution while capturing viewport to file or to clipboard via commands ViewCaptureToFile...
Ufuboceros aims to help Rhino users by contributing Rhino's default user interface or by explaining some less known tips.
Most of the posts are about custom toolbars and buttons, menu arrangements and macros for specific needs.
Please help us by giving feedback and making contributions. You can also share our posts anywhere, including a credit to Ufuboceros.