請看下圖
按 ctrl 點擊 timecode的位置
會循序出現三種不同模式
§ To cycle through Timecode Base, Frames, and Feet + Frames, Ctrl-click (Windows) or Command-click (Mac OS) the current-time display at the bottom of the Composition, Layer, or Footage panel, or at the top of the Timeline panel.
也可以從Project Settings選擇
§ To change time display units, choose File > Project Settings, and choose from the options in the Display Style section.
各模式說明
Timecode Base
Displays time as timecode, using the frame rate that you specify as the timecode base. Auto uses the rounded frame rate of the footage item or composition. If an item doesn’t have timecode (such as an audio file), After Effects uses a default value (30 fps for English, Japanese, and Korean versions of After Effects, or 25 fps for French, German, Spanish, and Italian versions) or the last non-auto value you specified in the Project Settings dialog box. You can also specify that After Effects use a specific frame rate.
Note: You can specify specific frame rates for display in the Timecode Base menu; however, in most cases, you should leave the timecode base set to Auto.
Feet + Frames
Displays number of feet of film, plus frames for fractional feet, for 16mm or 35mm film. Numbering starts at the frame number that you specify with the Start Numbering Frames At value.
Frames
Displays frame number instead of time. Use this setting for convenience when doing work that you are integrating with a frame-based application or format, like Flash or SWF.
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