Publishing: Draft Version and Publish Version

• Publish version
  your channel talks to customers using the publish version.
• Draft version
  any edit to Steps is saved automatically to the draft version. You can edit your flow without affecting the channel and test the draft version before you "Publish".

From the publish version to the draft version, 1 way:

• click "Edit Flow", in the upper left/right corner of the flow, to enter the draft version

From the draft version to the publish version, 3 ways:

• click "Publish" to save the draft to a new publish version
• discard the changes and go back to the most recent publish version
• keep the draft and switch to the publish version (this way you can take a look at your publish version and, when you click edit and come back, your draft will still be there)