I edited the following image to my satisfaction in one notebook. As basically all images I edit, it's intended for the web so anyone can see it in any device that can browse the web and has a screen. I assumed the proper screen angle on my notebook when I worked on it, always unsure because all the viewers will probably habe very different angles. After I finished editing and uploaded it, I opened it in a smartphone and it looked too dark, way more than the notebook in which I worked on it. After that, I also saw the image in a different notebook and it also looked a bit, this time with a little more yellow and not as grainy as in the first notebook. All this got me thinking about the hundreds of devices that will display the image and how it will look different in each one. Under those circumstances I feel lost. How can I edit an image to my satisfaction if many will see it very differently than what I intended? How do I know if this particular image is dark enough or too dark if I see it one way or another between one device and another? When I edited the image I tried for the backround to be around 95% black, not 100%. So that's my situation. Thank you in advance guys .