Tried to upload a header image (from mobile) for the first time in my Tumblr history, looks fine when I’m positioning it, great, save – then when i go back to my blog it’s only showing a teeny tiny corner of the image. Are you seriously telling me that in this year 2017 i have to actually manually resize an image header before it’ll show up properly??? And if you Google “Tumblr mobile header size 2017” you get a multitude of wildly different suggested dimensions. AND you can’t actually delete the image once you’ve uploaded it, only choose to not show it. Thank you Tumblr, thanks for your help. Ffssssss