What are the two ways?

In the page toolbar, "From your photo:":

• Regions made on this computer: free, one to three seconds. The photo's own colors are found, the grain is cleared, and regions too small for their number join their nearest neighbour.
• Simplified by your image engine first: your image engine repaints the photo in flat colors with big calm areas, then the regions are made from it. Cleaner for busy photos; one picture on your key. Once it is made, "Draw again" asks for a new one (another picture on your key). The second way is greyed out without an OpenAI or Gemini key in Settings.