Select

To the right of the prompt field is the select button. When toggling that on, your product preview changes from interaction mode to select mode, and you are now able to select elements and edit them.

In Split mode the select button is at the top of the screen, between the two views.

If you have an element selected in the view area, this is reflected in the prompt field by the "@"-badge. In this case a button is selected.

The selection is for editing the element yourself. Henosia doesn't receive it with your prompt, so describe the element when you ask for a change. For example: "Please change the label of the Details button on the product cards to "View product"".