On 10/01/2018 14:43, Sean Smith wrote: > My laptop is a Dell XPS-13 running CentOS 7. It has a 13" 1920x1080 > screen and it's a bit difficult for my mid-40s eyesight. Fedora and > Debian, on this laptop, give me the option of choosing 1600x900 which > is much easier for me to read but CentOS doesn't show this resolution > as available. > > I followed the steps I found in a post on stackexchange using xrandr, > substituting 1600x900 where applicable and it worked but, once I > rebooted, it went back to 1920x1080 with no 1600x900 option in > settings-display. > > Is there a way I can add 1600x900 resolution the list of available > resolutions in settings-display? Bit of a generic answer, and not a solution, but the problem for you isn't the resolution, it is the DPI you have set, isn't there a way for you to change the DPI without losing out on the quality of the screen?