Answer
On updated Android, ordinary Paste can attach a clipboard image; Paste Image remains available when offered. iOS uses native Paste. Web paste uses image data supplied by the browser’s paste event without a separate clipboard read. Explicit Paste Image may still require clipboard permission. If the source app supplies no readable image data, use Attach.
An ordinary pending upload has a Remove control. Removing it cancels that attachment while preserving the rest of your draft and other uploads. A canceled result cannot return. Send waits for active upload work to settle. Native videos keep their own preparation path.
Text mode also supports pasted webpage URLs for AI context. A pasted image link follows the separate image-import rules.