What method can be used to ensure that the buttons in the footer area of a long, scrollable pop-up page remain visible?

The correct approach to ensure that the buttons in the footer area of a long, scrollable pop-up page remain visible involves making strategic layout decisions within the design of the page. Removing the outer layout grid can effectively allow the footer area to remain accessible and fixed while the rest of the content scrolls independently.

In many design contexts, wrapping content in a structure that can scroll while keeping buttons at the bottom visible can be tricky, especially if the layout grid adds constraints that aren't suitable for pop-up interactions. By eliminating the outer layout grid, you avoid potential complications with both overflow and the positioning of the buttons, allowing for a design where the footer elements can remain in view.

The other options would not achieve the same effect. For instance, a fixed layout grid might not allow the footer to remain in view as content is scrolled. Adding more buttons at the top could clutter the interface and does not address the visibility of the original footer buttons. Lastly, restricting page scroll would contradict the need for a long, scrollable pop-up, as it would limit the user’s ability to access the content. Thus, the choice to remove the outer layout grid is crucial for maintaining the visibility of buttons in the footer area.