I'm new to this website.
So I've just downloaded raspbian onto my Pi, and in the setup process and I ticked a checkbox that said something along the lines of "This resolution doesnt work" by accident. I restarted and the resolution was off. The screen doesn't fit on my monitor. I've tried to fix it, I've looked it up and all I've done is mess it up more. now it's too small. If you could help me that would be awesome thanks.