A composition contains layers of footage, and describes how you arrange them in space and time. This section explains how to create a composition; the following section describes how to choose specific settings that define a composition's spatial and temporal attributes.
To create a new composition:
Do one of the following things: Choose Composition > New Composition (Figure 1).
Press Command-n (Mac) or Ctrl-n (Windows).
At the bottom of the Project window, click the Composition button (Figure 2).
Choose Composition > New Composition, or simply press Command-n (Mac) or Ctrl-n (Windows)...
...or click the Composition button at the bottom of the Project window.
A Composition Settings dialog box appears (Figure 3).
In the Composition Settings dialog box, enter the appropriate settings for the composition.
In the Composition Settings dialog box, choose a name, frame size, pixel aspect ratio, frame rate, duration, and display resolution for the composition.
Click OK to close the Composition Settings dialog box. A new composition appears in the Project window, and a related Composition window and Time Layout window open (Figure 4).
A composition appears in a Composition window, Time Layout window, and as an icon in the Project window.
• It's easy to forget to name the composition, or simply settle for the default name, Comp 1. Do yourself a favor and give the composition a descriptive name. This will help you stay organized as your project becomes more complex.