We can achieve the effect of hiding and showing pictures through triggers.
Step 1: Add an image to the page, insert a shape the same size as the image, select "Texture Fill", and set the "Transparency" to 20%.
Step 2: On the left side of the picture, insert a circle and a text box, and enter the text "click to erase" in the text box.
Step 3: Select the shape just filled with texture, and click "Animation"-"Erase".
Step 4: Select the animation effect you just added, and click "Trigger"-"Click"-"Circle".
Step 5: Add a zoom-in animation to the bottom-most picture, select "After the previous animation" for the effect, and drag it to the back of the erase animation.
Step 6: Complement the corresponding copywriting and background.
In this way, the effect of hiding and displaying pictures can be achieved through triggers. Let's click on the slideshow to see the effect: