Video/display output settings

So, I messed with the settings while watching a movie. Once I turned off the program and restarted it it seems like the program is WAAAAYYYY to Zoomed in. Problem is I cant get back to the settings to fix it. I have tried turning the prgr\am off and back on, Unstalling and reinstalling and hitting arrow buttons and enter to see what pops up. I have had no success and it seems normal command prompts or zooming out doesnt work either Please save me!!!!