2. The dynamic background is to make the background of the blue sky and the sea pass by and seabirds fly by, make the background picture of ppt come alive and insert pictures of seabirds and ships. Here, I would like to remind you that it is best to insert a picture with a transparent background in order to better integrate with the original PPT background material. Click "Insert" to insert PPT background material.
3. Now let's set how to make the PPT background move. First, set the original background picture of PPT to have animation effect. As the background image of PPT, you need to set the switching effect for PPT, click the switching scheme in the menu item Switching, and select a switching scheme in the switching scheme, such as Honeycomb.
4. The previous switching effect is only to let the PPT background picture come out, and continue to set the dynamic appearance of other PPT background materials. For example, set two sailboats to cross from far to near, click the picture of the sailboat, then click the menu item Animation → Add Animation → Enter the zoom effect, and set the start time of the sailboat animation to "at the same time as the previous animation" for 5 seconds.
5. Then set the animation of seabirds flying over the sea. Click on the seabird picture, click Add Animation → Action Path → Arc. At this time, the picture of the sea bird has an arc animation path.
6. Improve the animation of seabirds flying: click one end of seabirds' arc action path, stretch the arc across the entire PPT slide, and set the start of the animation "timing" to "at the same time as the previous animation", and the duration is also 5 seconds.
7. Now that the animation of seabirds and sailboats has been set up, you can preview the effect. Click the "Preview" button of "Animation", because the animation start time of seabirds and sailboats is set to "at the same time as the previous animation", so their ppt animation effects are played together.