User Manual Sharp LC-50LBU711C 50" 4K UHD LED Roku Smart TV

Occasionally, black bars appear on the screen when a movie is playing because the aspect ratio of the movie doesn’t match the TV picture aspect ratio setting. To change the picture size on your TV, go into the Settings menu and change the Aspect Ratio.
Note: Cinemascope movies filmed in an anamorphic aspect ratio will display black bars on the tops and bottoms of all widescreen TVs

You can only remove (uninstall) apps that you downloaded to the TV. Factory-installed apps (such as Netflix, etc.) cannot be uninstalled. However, you can remove the TV from accounts for factory-installed apps. If you do, remember to contact the app service provider to let them know billing should be stopped

Yes. If you prefer to use your cable set-top box or satellite receiver as a universal remote, please refer to the manual that your cable or satellite service provided. It will include instructions on how to program their remote to work with your television.