Can I delete a 'Speak' or image that I sent before the conversation started?

No, you cannot delete any items (questions, images, videos, or Speaks) that you send in a Remesh Live Conversation, regardless of whether or not the Conversation has started. In a Flex conversation, you can make limited edits once the conversation is published.

If you want to practice moderating or see how images will look in the Conversation, please create a separate Conversation and select Non-Billable as the purpose.