If you are posting to a specific "Avatar" (movie or show) fan community like r/Avatar on Reddit :
Use Canva's Avatar Maker to set a custom canvas size of 1500x896, upload your background, and add AI-generated or custom characters. 1500x896 Avatar hГЎttГ©rkГ©p>
Pick a pose or background that fits your 1500x896 theme. You can also edit your avatar's appearance if needed. If you are posting to a specific "Avatar"
Type your message over the avatar graphic and tap Post . Designing a Custom Post (1500x896) upload your background
Since 1500x896 is a specific landscape resolution (common for some blog headers or desktop wallpapers), you can use design tools to "put together" a professional post: