Improving HDMI input

[Cowboooy]

Hello everyone,
How can I configure HDMI input?
For example First; when I plug in HDMI cable I always configure audio outputs and select HDMI device to get sound from HDMI device not from computer, Second; configuring display manager for mirror the screen to HDMI device, sometimes screen seen low resoultion or part of the screen not displayed.
Is it possible to configure these options automatically or make theme more easy?

Thank you.