Image Formats: When uploading images, please use only those formats: with near universal browser support: gif, jpg, and png. [ Learn more about supported image formats ]
File Naming Conventions: When naming files to be uploaded, please use a lowercase, 3 character file extension (i.e. “jpg”, not “JPEG”). Also. please refrain from using special characters (such as + , . \ / : * ? " < > |) and spaces, though dashes and underscores are perfectly acceptable.