Tails can t change resolution

1. How do I change resolution in tails?
2. Why I can't change my resolution in Ubuntu?

How do I change resolution in tails?

To change the screen resolution from inside Tails, choose Applications ▸ System Tools ▸ Settings ▸ Displays ▸ Resolution. You might also need to adjust the virtual machine window in the host OS to fit the new screen resolution.

Why I can't change my resolution in Ubuntu?

The resolution settings are found in the Display Settings. To access the Display Settings, right-click on the desktop and select “Display Settings.” From there, click on the “Resolution” option. Select your monitor's native resolution.