You cannot simply upload a tall image through the standard Steam client; it will be cropped or resized. You must use a web browser (Chrome or Firefox) and the "Console" trick.
Click the large slot and select your newly uploaded "long" image. It may look like a thin line in the selector, but it will expand to its full height on your actual profile (Steam Guide). 3A9A0064.jpg
Save your file (currently 3A9A0064.jpg ) as a .jpg or .png . 📤 Step 2: The "Infinite Height" Upload Trick You cannot simply upload a tall image through
Any height you want (this is what makes it "long"), but keep file size under 5MB (Steam Community). 3A9A0064.jpg