After Effects
開啟應用程式
After Effects User Guide
Beta releases
Beta Program Overview
After Effects Beta Home
Getting started
Get started with After Effects
What's new in After Effects
Release Notes | After Effects
After Effects system requirements
Keyboard shortcuts in After Effects
Supported File formats | After Effects
Hardware recommendations
After Effects for Apple silicon
Planning and setup
Tip of the Day
Workspaces
General user interface items
Get to know After Effects interface
Workflows
Workspaces, panels, and viewers
Improved UI language support
Projects and compositions
Projects
Composition basics
Precomposing, nesting, and pre-rendering
View detailed performance information with the Composition Profiler
CINEMA 4D Composition Renderer
Importing footage
Preparing and importing still images
Importing from After Effects and Adobe Premiere Pro
Importing and interpreting video and audio
Preparing and importing 3D image files
Importing and interpreting footage items
Import SVG files
Working with footage items
Detect edit points using Scene Edit Detection
XMP metadata
Text and Graphics
Text
Formatting characters and the Character panel
Text effects
Creating and editing text layers
Formatting paragraphs and the Paragraph panel
Extruding text and shape layers
Animating text
Examples and resources for text animation
Live Text Templates
Motion Graphics
Work with Motion Graphics templates in After Effects
Use expressions to create drop-down lists in Motion Graphics templates
Work with Essential Properties to create Motion Graphics templates
Replace images and videos in Motion Graphics templates and Essential Properties
Animate faster and easier using the Properties panel
Variable Font Axes
Variable Font Axes support
Working with Variable Font Axes
Scripting support for Variable Font Axes
FAQ for Variable Font Axes
Drawing, Painting, and Paths
Overview of shape layers, paths, and vector graphics
Paint tools: Brush, Clone Stamp, and Eraser
Taper shape strokes
Shape attributes, paint operations, and path operations for shape layers
Use Offset Paths shape effect to alter shapes
Creating shapes
Create masks
Remove objects from your videos with the Content-Aware Fill panel
Roto Brush and Refine Matte
AI-powered Object Matte
Create Nulls for Positional Properties and Paths
Layers, Markers, and Camera
Selecting and arranging layers
Blending modes and layer styles
3D layers
Layer properties
Creating layers
Managing layers
Layer markers and composition markers
Cameras, lights, and points of interest
Animation, Keyframes, Motion Tracking, and Keying
Animation
Animation basics
Animating with Puppet tools
Managing and animating shape paths and masks
Animating Sketch and Capture shapes using After Effects
Assorted animation tools
Work with Data-driven animation
Proportional Scrubbing in timeline
Quickly search and apply effects, presets, or menu commands
Keyframe
Keyframe interpolation
Setting, selecting, and deleting keyframes
Editing, moving, and copying keyframes
Motion tracking
Tracking and stabilizing motion
Face Tracking
Mask Tracking
Mask Reference
Speed
Time-stretching and time-remapping
Timecode and time display units
Keying
Keying
Keying effects
Transparency and Compositing
Compositing and transparency overview and resources
Alpha channels and masks
Track Mattes and Traveling Mattes
Adjusting color
Color basics
Color management
Color Correction effects
OpenColorIO and ACES color management
Enhanced HDR support
HDR import and export
Effects and Animation Presets
Effects and animation presets overview
Effect list
Effect Manager
Simulation effects
Stylize effects
Audio effects
Distort effects
Perspective effects
Channel effects
Generate effects
Time effects
Transition effects
The Rolling Shutter Repair effect
Blur and Sharpen effects
3D Channel effects
Utility effects
Matte effects
Noise and Grain effects
Detail-preserving Upscale effect
Obsolete effects
Cycore plugins
Expressions and Automation
Expressions
Expression basics
Understanding the expression language
Using expression controls
Syntax differences between the JavaScript and Legacy ExtendScript expression engines
Editing expressions
Expression errors
Using the Expressions editor
Use expressions to edit and access text properties
Expression language reference
Expression examples
Automation
Automation
Scripts
Immersive video, VR, and 3D
Construct VR environments in After Effects
Apply immersive video effects
Compositing tools for VR/360 videos
Advanced 3D Renderer
Import and add 3D models to your composition
Import 3D models from Creative Cloud Libraries
Create parametric meshes
Image-Based Lighting
Animated Environment Lights
Enable lights to cast shadows
Extract and animate lights and cameras from 3D models
Tracking 3D camera movement
Adjust Default Camera Settings for 3D compositions
Cast and accept shadows
Embedded 3D model animations
Shadow Catcher
3D depth data extraction
Enable in‑engine Depth of Field in Advanced 3D
Modify materials properties of a 3D layer
Apply Substance 3D materials
Work in 3D Design Space
3D Transform Gizmos
Single 3D Gizmo for multiple 3D layers
Do more with 3D animation
Preview changes to 3D designs real time with the Mercury 3D engine
Stereoscopic 3D in After Effects
Add responsive design to your graphics
Views and Previews
Previewing
Video preview with Mercury Transmit
Modifying and using views
Lossless Compressed Playback
Rendering and Exporting
Basics of rendering and exporting
H.264 Encoding in After Effects
Export an After Effects project as an Adobe Premiere Pro project
Converting movies
Multi-frame rendering
Automated rendering and network rendering
Rendering and exporting still images and still-image sequences
Using the GoPro CineForm codec in After Effects
Working with other applications
Dynamic Link and After Effects
Working with After Effects and other applications
Export After Effects project as Premiere Pro project
Creative Cloud Libraries in After Effects
Plug-ins
Cinema 4D and Cineware
Collaboration: Frame.io, and Team Projects
Collaboration in Premiere Pro and After Effects
Frame.io
Install and activate Frame.io
Use Frame.io with Premiere Pro and After Effects
Frequently asked questions
Team Projects
Get Started with Team Projects
Create a Team Project
Collaborate with Team Projects
Memory, storage, performance
Memory and storage
How After Effects handles low memory issues while previewing
Improve performance
Preferences
GPU and GPU driver requirements for After Effects
Knowledge Base
Known issues
Fixed issues
Frequently asked questions
After Effects and macOS Ventura
How After Effects handles low memory issues while previewing
Create and refine masks in Adobe After Effects to define visible areas, isolate elements, and achieve precise compositing results.
You can create shapes and masks with the Rectangle and Pen tool in After Effects. When you create a mask or shape layer, keep the following things in mind:
If a layer is selected in the Timeline panel, you are creating a mask.
If a layer is not selected in the Timeline panel, you are creating a shape layer.
備註
Shortcuts for the Shape tool is Q, and the Pen tool is G.
Create masks
You can create one or more masks for each layer in a
composition using any of the following methods:
Draw a path using Shape or Pen tool. Drawing a mask path is similar to drawing a shape path.
Learn more about creating a shape or mask by dragging with shape tools and creating a Bezier shape or mask using the Pen tool.
Specify the dimensions of the mask path numerically in the Mask Shape dialog box.
Learn how to create a rectangular or elliptical mask numerically.
Convert a shape path to a mask path by copying the shape’s path to the Mask Path property.
Convert a motion path to a mask path.
Learn more about creating a mask or shape from a motion path.
Trace color or alpha channel values to create a mask using the Auto-trace command.
Learn more about creating a mask from a channel with Auto-trace.
Paste a path copied from another layer or from Adobe Illustrator or Photoshop.
Learn more about copying a path from Illustrator or Photoshop.
Convert a text layer to one or more editable masks on a solid-color layer by using the Create Masks From Text command.
Learn more about creating shapes or masks from text characters.
Use captured shapes to create motion graphics.
Learn more about using captured shapes to create motion graphics.
Points to keep in mind
When you create masks on a layer, the mask names appear in the Timeline panel outline in the order in which you create the masks. To organize and keep track of your masks, rename them.
To rename a mask, select it and press Enter (Windows) or Return (macOS), or right-click (Windows) or control+click (macOS) the mask name and select Rename.
When you create additional masks for one layer in the Layer panel, make sure that the Target menu in the Layer panel is set to None; otherwise, you replace the targeted mask instead of creating a mask. You can also lock a mask to prevent changes to it.
When creating or editing masks, look in the Info panel for information such as the mask name and the number of vertices in the mask.
Create a mask that moves independently of its primary layer it is masking
Create the mask on a separate white solid layer, and use that solid layer as a track matte for the primary layer.
Use parenting to make the solid layer a child of the primary layer so that the mask moves with the primary layer as if applied directly. Because the solid layer is a child layer, it can also be animated independently of its parent.
You can use motion tracking to make the solid layer (and, therefore, the mask) follow moving objects in the primary layer. Learn about converting a layer into a track matte and parent and child layers.
Create a mask by dragging with shape tools
The shape tools are the Rectangle , Rounded Rectangle , Ellipse , Polygon , and Star tools.
秘訣
To activate and cycle through the shape tools, press Q.
A polygon is a star without an Inner Radius or Inner Roundness property. So, the name of the shape created for a polygon or a star is the same: polystar.
You can create a mask by dragging with a shape tool on a selected layer in the Composition or Layer panel.
備註
To draw a mask on a shape layer, select the Tool Creates Mask button in the Tools panel with a shape tool active.
Learn how to create shapes by dragging shape tools.
Create a rectangular or elliptical mask numerically
Select a layer in the Composition panel or display a layer in the Layer panel.
Select Layer > Mask > New Mask. A new mask appears in the Composition or Layer panel with its handles at the outer edges of the frame.
Select Layer > Mask > Mask Shape.
Select Reset To, choose Rectangle or Ellipse from the Shape menu, and specify the size and location of the bounding box for the mask.
Use the Mask Shape dialog box to create, refine, and adjust Mask properties numerically.
Use the Mask Shape dialog box to create, refine, and adjust Mask properties numerically.
Create a mask from channel values with Auto-trace
You can convert the alpha, red, green, blue, or luminance channel of a layer to one or more masks by using the Auto-trace command. Auto-trace creates as many Bezier masks as necessary to outline the specified channel values in the layer. It also creates masks with the smallest number of vertices possible while conforming to the settings that you choose. You can modify a mask created with Auto-trace as you would any other mask, and you can link its path to other path types, such as shape paths on a shape layer, using expressions.
When you apply Auto-trace, affected layers are automatically set to Best Quality to ensure accurate results.
備註
To reduce the number of masks created by Auto-trace, apply a keying effect to the layer to isolate your subject before applying Auto-trace.
In the Timeline panel, do one of the following:
To create mask keyframes at a single frame,
drag the current-time indicator to the desired frame.
To create mask keyframes across a range of frames,
set a work area that spans that range.
Select one or more layers and choose Layer > Auto-trace.
Select one of the following:
Current Frame
Creates mask keyframes at only the current frame.
Work Area
Creates mask keyframes for frames within the work area.
Once done, select from any of the following options:
Invert: It inverts the input layer before searching for edges.
Blur: It blurs the original image before generating the tracing result. Use it to reduce small artifacts and to smooth jagged edges. Deselect this to closely trace details in a high-contrast image.
Tolerance: How far, in pixels, the traced path is allowed to deviate from the contours of the channel.
Threshold: Specifies, as a percentage, the value that a pixel’s channel must have for that pixel to be part of an edge. Pixels with channel values over the threshold are mapped to white and are opaque; pixels with values under the threshold are mapped to black and are transparent.
Minimum Area: Specifies the smallest feature in the original image that is traced. For example, a value of 4 removes features smaller than 2 pixels wide by 2 pixels high from the tracing result.
Corner Roundness: Specifies the roundness of the mask curve at vertices. Enter a higher value for smoother curves.
Apply To New Layer: Applies the mask to a new solid the same size as the selected layer. It's automatically selected for layers that have Collapse Transformations enabled.
Preview: Select to preview the mask results and the results of the various options of the Auto-trace command.
Create a mask of the size of the layer
Select the destination for the new mask:
To create a mask, select a layer in the Timeline, Layer, or Composition panel. To create a mask on a shape layer, select Tool Creates Mask in the Tools panel with a shape tool active.
To replace a mask path, select the mask in the Timeline, Layer, or Composition panel.
In the Tools panel, double-click the Rectangle , Rounded Rectangle , Ellipse , Polygon , or Star tool.
Create masks from text characters
The Create Shapes From Text command extracts the outlines for each character, creates shapes from the outlines, and puts the shapes on a new shape layer. You can then use these shapes as you would any other shapes. It extracts the outlines for each character, creates masks from the outlines, and puts the masks on a new solid-color layer. You can then use these masks as you would any other masks.
Select the text to convert to masks:
To create masks for all characters in a text layer, select the text layer in the Timeline or Composition panel.
To create masks for specific characters, select the characters in the Composition panel.
Do one of the following:
Select Layer > Create Masks From Text.
Right-click (Windows) or Control+click (macOS) the layer or text and choose Create Masks From Text from the context menu.
Points to note
The Video switch for the text layer is turned off.
The new solid-color layer is created at the top of the layer stacking order.
For characters that consist of compound paths—such as i and e—multiple masks are created and combined with the Subtract mask mode.
Create a mask from a motion path
You can copy position keyframes, anchor point keyframes, or an effect control point's position keyframes and paste those keyframes into a selected mask path or shape path. When you create mask paths or shape paths from motion paths, make sure that you copy keyframes from a single Position property only—don't copy the keyframes of any other property.
秘訣
Draw a motion path with Motion Sketch (Enable the panel by selecting Windows > Motion Sketch) and then paste the path into a mask path or shape path.
備註
When copying between a mask path to a motion path, keep in mind that the mask path’s values are expressed in the coordinate system of the layer (layer space), whereas the motion path’s values are expressed in the coordinate system of the composition (composition space). This difference causes the pasted path to be offset, requiring you to reposition the path after pasting it. Learn more about coordinate systems – composition space and layer space.
Create a mask path from a motion path
In the Timeline panel, select the name of the Position property or Anchor Point property from which you want to copy the motion path. This selects all keyframes. However, to select only some of the keyframes of a motion path, Shift+click them.
Select Edit > Copy.
To create a mask, select the layer on which to create the mask, and select Layer > Mask > New Mask.
In the Timeline panel, select the name of the Mask Path property for the mask into which to paste the keyframes from the motion path.
Select Edit > Paste.
More like this
Alpha channel interpretation
Managing and animating shape paths and masks
Split a layer
Set Matte effect
Track Matte and Traveling Matte