Change display scaling and text size back to 100%
https://support.microsoft.com/en-us/windows/change-the-size-of-text-in-windows-1d5830c3-eee3-8eaa-836b-abcc37d99b9a
Reduce your text and display scaling to 100% so you can see the email and password fields.
https://support.microsoft.com/en-us/windows/change-your-screen-resolution-and-layout-in-windows-5effefe3-2eac-e306-0b5d-2073b765876b
I don't think the simulation has any knowledge of these things (assuming you're referring to the CL650's fuel truck and not the sim's "ground services").