What’s the best way to add letterbox, black and white, or other video effect that covers the whole film? (It’s an adjustment layer!)

It sounds like you want to use an adjustment layer for an effect that covers multiple video clips in your timeline.

• Download the Alex4D Adjustment Layer from the Docs & Files > Adjustment Layer folder of the Digital Media Technology Basecamp HQ.
• Once it’s downloaded, double-click the .dmg file to open.
• Move the folder Alex4D Adjustment Layer to your user directory in the following location: Movies > Motion Templates > Titles

Here’s a short video that shows an adjustment layer in action. Let me know if you have more questions!