Yes. If you're on the main menu, press "Setup", which should bring you directly to the "Video" sub-menu. Click on "Video Mode" (the second item down) until it says "Custom Resolution", and then type in 1920 and 1080.
Note that Widescreens resolutions result in a stretched menu and, if you're using the OpenJK engine instead of the JAMP engine, a stretched HUD. Also make sure that you have "Widescreen FoV" turned on in Camera Options.
Yes, you can look for the options in settings for Video Mode: Custom and then specify the values you'd like. If you prefer console you can type:
/r_mode -1
/r_customwidth 1920
/r_customheight 1080
/vid_restart
Windows technical FAQ/troubleshooting guide , see "Issue: Mouse is acting weird, movement of cursor on the screen doesn't match mouse movement.When i switch to the resolution i can only see top left of the screen on my whole screen..
Windows technical FAQ/troubleshooting guide , see "Issue: Mouse is acting weird, movement of cursor on the screen doesn't match mouse movement.
Image is cropped, you cannot see right and bottom sides."