i am trying to create a process which involves going back to a step in the same process twice.
As the picture shows.
any suggestions on how to illustrate this?
Nintex Promapp has been designed intentionally to prevent loops like this within a process. A process should display the expected outcome with any exceptions logged as notes, process links, conditional process links, parallel activities or even tasks. The result we're looking for here is a simple process for an end user to digest and follow.
A note is a great way to pose a question, particularly if it follows an 80/20 rule. The decision in your screenshot could be avoided by adding a note to one of the other activities posing a question along the lines of "Has a review been conducted?". Within the response to this you can respond with any relevant information and link the process at the bottom of the note.
Have a look at our course on Learning Central - Promapp for Process Authors - Advanced Features - https://learn.nintex.com/series/nintex-promapp/promapp-for-process-authors-advanced-features
This course will help provide some insight as to why these features work the way they do.