An After Effects project is a single file that stores compositions and references to all of the source files used by footage items in that project. Compositions are collections of layers. Many layers use footage items (such as movies or still images) as a source, though some layers—such as shape layers and text layers—contain graphics that you create within After Effects.
A project file has the filename extension .aep or .aepx. A project file with the .aep filename extension is a binary project file. A project file with the .aepx filename extension is a text-based XML project file.
The name of the current project appears at the top of the application window.
A template project file has the filename extension .aet. (See Template projects and example projects.)
Text-based XML project files contain some project information as hexadecimal-encoded binary data, but much of the information is exposed as human-readable text in string elements. You can open an XML project file in a text editor and edit some details of the project without opening the project in After Effects. You can even write scripts that modify project information in XML project files as part of an automated workflow.
Elements of a project that you can modify in an XML project file:
Marker attributes, including comments, chapter point parameters, and cue point parameters
File paths of source footage items, including proxies
Composition, footage item, layer, and folder names and comments
Note:
Footage item names are exposed in string elements in XML project files only if the names have been customized. Footage item names derived automatically from the names of source files and solid color names are not exposed in string elements
Some strings, such as workspace and view names, are exposed as human-readable strings, but modifications made to these strings are not respected when After Effects opens the project file.
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Do not use the XML project file format as your primary file format. The primary project file format for After Effects is the binary project file (.aep) format. Use the XML project file format to save a copy of a project and as an intermediate format for automation workflows.
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To save an XML project (.aepx) file as a binary project (.aep) file, choose File > Save As and enter a file name ending with .aep, without the x. (See Save and back up projects in After Effects.)
When you render a movie and export it to a container format, you can embed a link to the After Effects project in the container file.
To import the project, import the container file, and choose Project from the Import As menu in the Import File dialog box. If the container file contains a link to a project that has been moved, you can browse to locate the project.
Only one project can be open at a time. If you create or open another project file while a project is open, After Effects prompts you to save changes in the open project, and then closes it. After you create a project, you can import footage into the project.
To create a project, choose File > New > New Project.
To open a project, choose File > Open Project, locate the project, and then click Open.
You can also create and open a project from the Start screen.
- To create a project, click New Project.
- To open a project, click Open Project and navigate to the location of the project.
Jeff Almasol provides a script on his redefinery website that creates and saves a new project for each selected composition in the current project.
A template project is a file with the filename extension .aet. You can create new templates based on your projects.
Note:
After Effects CC does not install template projects.
When you open a template project, After Effects creates a new, untitled project based on the template. Saving changes to this new project does not affect the template project.
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A great way to see how advanced users use After Effects is to open one of the template projects included with After Effects, open a composition to activate it, and press U or UU to reveal only the animated or modified layer properties. Viewing the animated and modified properties shows you what changes the designer of the template project made to create the template.
Often, the creator of a template project locks layers that should be left unmodified, and leaves layers that should be modified unlocked. This is a convenient way to prevent accidental or inappropriate modifications.
For more sources of After Effects example projects and template projects, see After Effects community resources on the Adobe website.
See this video tutorial by Andrew Devis on the Creative Cow website for information about where to find template projects and sample expressions included with After Effects.
- To open a template project, choose File > Open Project. On Windows, choose Adobe After Effects Project Template from the Files Of Type menu.
- To convert a project to a template project, change the filename extension from .aep to .aet.
- To save a copy of a project as a template project, choose File > Save A Copy, and then rename the copy with the filename extension .aet.
- To save a project, choose File > Save.
- To save a copy of the project with a new automatically generated name, choose File > Increment And Save, or press Ctrl+Alt+Shift+S (Windows) or Command+Option+Shift+S (Mac OS).
- A copy of the current project is saved in the same folder as the original project. The name of the copy is the name of the original followed by a number. If the name of the original ends with a number, that number is increased by 1.
- To save the project with a different name or to a different location, choose File > Save As > Save As. The open project takes the new name and location; the original file remains unchanged.
- To save the project as a copy in the XML project file format, choose File > Save As > Save A Copy As XML. (See About projects.)
- To save a copy of the project with a different name or to a different location, choose File > Save As > Save A Copy. The open project retains its original name and location, and a copy is created with the new settings but is not opened.
- To save a copy of a project so that it can be opened by the previous major version., choose File > Save As > Save A Copy As <previoius major version number>. (For more information, see this blog.)
Note:
New features in the current version of After Effects that are used in a project will be ignored in the project that is saved in the format of the previous version of After Effects.
To save a copy of the project and copies of assets used in the project to a single folder on disk, use the Collect Files command. (See Collect files in one location section for details).
In the flowchart for each project or composition, individual boxes (or tiles) represent each composition, footage item, and layer. Directional arrows represent the relationships between components.
Note:
The Flowchart panel shows you only the existing relationships. You cannot use it to change relationships between elements.
Nested compositions and other elements that make up the composition appear when you expand a composition tile.
Mid-gray lines between tiles in the flowchart indicate that the Video or Audio switch for those items is deselected in the Timeline panel. Black or light gray lines indicate that the switch is selected, depending on the Brightness setting in the Appearance preferences.
- To open the project flowchart, press Ctrl+F11 (Windows) or Command+F11 (Mac OS), or click the Project Flowchart
button at the top of the vertical scroll bar on the right edge of the Project panel. - To open a composition flowchart, select the composition and choose Composition > Composition Flowchart, or click the Composition Flowchart button at the bottom of the Composition panel.
- To activate (select) an item, click its tile in the Flowchart panel.
When you click a composition in the flowchart, it becomes active in the Project panel and the Timeline panel. When you click a layer, it becomes active in the Timeline panel. When you click a footage item, it becomes active in the Project panel.
- To customize the appearance of the flowchart, use the Flowchart panel menu and the buttons along the bottom of the panel.
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For tool tips identifying the buttons in the Flowchart panel, let your pointer hover over a button until the tool tip appears.
- To delete elements, select them and press Delete. If the selected element is a footage item or composition, it is deleted from the project and no longer appears in the Timeline and Project panels. If the selected element is a layer, it is deleted from the composition in which it appears.
- To access the context menu for a selected element, right-click (Windows) or Control-click (Mac OS) the icon to the left of the name in the element tile. The icons have various appearances, depending on the element type, such as layers
and compositions 
. For example, you can use the context menu for a layer to work with masks and effects, or to change switches, apply transformations, and adjust layer image quality.
Note:
When you change element properties in the Flowchart panel, be careful to context-click the icon in the tile, not the name of the element. The context menu associated with the element icon is different from the one that opens from the element name.
Rich Young provides additional information about the Flowchart panel and the Composition Mini-flowchart on the After Effects Portal website.
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