Credit: littleny | Shutterstock. Depression, or major depressive disorder, is a mental health condition marked by an extended sense of sadness and despair that affects how a person thinks, feels and functions. The condition may significantly interfere with a person's daily life and may prompt thoughts of suicide.
Although the 851 x 315 dimensions of the standard Facebook cover is fairly common knowledge, the key to ultimately having your cover and the smaller inset profile picture work together with technical accuracy is to anticipate in Photoshop how the two will visually interact.
Other large printouts including rollups, banners etc have various ppi's. 1  To answer your first question. 2  If you want to display your poster online, you definitely need to make another smaller version of it at 72ppi and decrease its dimensions a bit to something about 1920x1080 if you want it to show full screen or so.