My preferred way of embedding an image in a checkvist list item is:
First, I copy the image (command + c) from the document it is in (e.g. a web page).
Then, I paste it (command + v) into the proper checkvist list item.
By default, checkvist embeds the image at the end of the list item. However, it is often better to embed it at the beginning.
Any idea how I could specify whether I want the image to be embedded at the beginning or at the end of the list item?