I want to prototype a PDF or other document viewer allowing the user to scroll through a 2-3 page document (images arranged like pages) and then direct them to select the target text on the document.

Telling a user to select the text, they naturally want to drag to highlight and select the text as they would in a text editor or viewer.

I want to simulate that so I tried putting a small box with opacity set to 0% just to the left of the text. Then I copied the object for naming and start position and put it on the second artboard, followed by adjusting the object to cover the intended text and set opacity to 50% and some color. On both artboards, these objects are contained in the scrollable area so the user can still scroll the document freely. But when the drag trigger is selected with auto animate between the artboards, dragging in the PREVIEW results in either no animation or jerky/flashing artboards that don't simulate the text selection. I could be doing something wrong and even put a support ticket in thinking it was a bug.

I believe that there is a bug or lack of polish on the feature to allow dragging while inside a scrollable area. That and if the artboards are nearly identical, passing the preserve scrolling of the scrollable area from one to the other doesn't seem to be a thing.