Which is my screen resolution?

When you create an Unattended Robot by default it is set to Login To Console: True. When it creates the RDP session I believe the virtual display adaptor will negotiate to 1024x768 or whatever the native resolution of the display adapter is. If you are using an interactive session Login To Console: False then it will either

  1. The resolution configured in the Robot Settings (when making a new session)
  2. Use the existing resolution if connecting to a pre-existing session.

The other consideration is you should ideally be developing in the resolution and scale that is as close to the production environment as possible to avoid any potential issues.

Please see some of my older comments around this topic, that should help shed some light for you.