As the upstairs said, make more pages to link with each other (cover up).

Your question: It can be achieved by two strategies:

First, click "+"to add a marquee: make "+"a trigger and add a marquee to the animation.

The second type: click on the "triangle" and use animation+hyperlink (smoke screen method) between slides to achieve it.

Example: Insert a triangle after working data,-hyperlink to page 2. Hyperlink to page 2 when clicking the triangle; The selection of working materials on page 2 is completed by using text boxes, which are combined together (setting hyperlinks on specific content pages) to set the entry animation of this combined shape: cut down, before.

It means, click the triangle-jump to the second page immediately, and the second page will automatically expand the menu animation. Because the second page is the same as the first page, there is no trace of jumping visually. This is a cover-up.