I am very new to Linux in general and elementary in particular (2-3 days) so this question might be dumb. I do the majority of my work on a second HDMI monitor. In windows, i could resize the display area to 76% so that nothing was hidden behind the edges of the monitor, but i can't seem to understand how to do this in elementary. I've tried xrandr's scale command but it only changes the resolution without allowing me to view the full picture.
Any help would be greatly appreciated as it is quite inconvenient. Also, please explain everything as if you were talking to an imbecile because i'm not yet completely comfortable with even the most basic commands.