Pictures inside an email

Pictures placed inside a draft are shown on the compose screen and sent exactly as you saw them.

Mail drafts can hold pictures placed inside the text, not only attached at the end. In 1.4.2 those pictures are shown on the compose screen, in their place, and they are part of what you confirm when you press Send.

That matters because of how Send works in Sketchbook: the app sends exactly the content you were shown, or nothing. So a picture only counts as shown once it has actually been drawn on the screen, and pictures above the quoted reply keep their place.

An older version of the app, which cannot show these pictures, is told plainly to update instead of sending a message you could not see.