Sure thing!

First, add a new state to the Popup called “Displayed” with a data type of “number”.

Instead of doing another search, you want to refer to the list of reviews within RG1. Your popup should have a data type of Review, and the Data Source should be “RG1’s List of Reviews: item #: Popup’s Selected” (referring to the state you just created).

When the first image is clicked,

  1. Set state of element Popup: Current Cell’s index
  2. Show Popup

Now for the left and right buttons, you do this action:

  • Set state of Popup: Popup’s Displayed +/- 1
    (plus for right, minus for left)

You should hide the left button if Popup’s Displayed is 1, and you should hide the right button if Popup’s Displayed = RG1’s List of Reviews:count.

There’s multiple ways to do this kind of thing, but hopefully this one is straightforward for you.