How do I create placeholders in After Effects that match the dimensions of my missing footage

1. Identify the missing footage in your After Effects project:
- In the Project panel, type "missing" in the search bar to find all the missing footage items.

2. Create a new placeholder to match the missing footage:
- Go to File > Import > Placeholder.
- In the New Placeholder dialog box, enter the following information:
- Name: The name of the missing footage file
- Size: The pixel dimensions of the missing footage
- Duration: The duration of the missing footage
- Click OK to create the placeholder.

3. Replace the missing footage with the placeholder:
- In the Project panel, right-click on the missing footage item and select "Replace Footage" > "Placeholder".
- The placeholder will now replace the missing footage throughout your project.

4. Adjust the placeholder as needed:
- You can resize, reposition, or apply effects to the placeholder just like any other layer in your composition.
- Make sure the placeholder matches the original footage in terms of size, duration, and frame rate for the best results.

By creating placeholders that match the missing footage, you can maintain the structure and layout of your compositions while you work on replacing the actual footage. This helps keep your project organized and ensures a smooth transition when the final footage becomes available.

Remember, you can also save the placeholder composition as a Motion Graphics template for easy reuse across multiple projects.