Standard Jetpack Compose TextField components don't handle rich content like GIFs, stickers, or pasted images out of the box. The contentReceiver modifier provides a unified API to handle rich content from soft keyboards, clipboard, and drag-and-drop in a single entry point. A step-by-step implementation shows how to build a RichContentTextField composable using a ViewModel to process TransferableContent, applying the modifier to a parent Column to create a broad drop zone, and using Coil's AsyncImage to render received image URIs.