trying to apply a relationship loop to a template

I have a one to many relationship and am trying to apply a relationship loop to a template.

I am trying to follow these instructions: but cannot find anywhere that refers to it in my build area.

It is based on ‘appraisals’ and I am trying to display all ‘objectives’ - the relationship between the 2 is a one to many.

Please can I have some help on relationship loops - I have used it before but cant remember how to get to it…

Create a sub template for the related object, eg:
In the main template, at the required location, add the sub template of the related object:

It should then appear like this in the main template:
The resulting PDF would look like this:

This is perfect and works exactly as I need, thank you!