If you're adding an intro video or 'opening animation' to your presentation, you might want it to match up seamlessly with your main menu design.
Here's how to do it.
Note: This advice works best for iOS.
Once you've established the main menu design, send a layered .psd or .ai file to your animator. This will give them the correct pixel dimensions to work with.
When the animator has finished the intro video, ask them to supply you with a .png of the final frame.
Replace the background image of your slide with the .png supplied by the animator. This overcomes any minor changes that happen during animation and helps with matching the most saturated colors.
As always, remember to publish your changes!