Arc 1.5
Download Arc 1.5, a powerful After Effects script developed by Zack Lovatt that revolutionizes how you create and manage expressions. This essential tool provides an intuitive interface for building, organizing, and linking expressions with visual controls—making complex expression workflows accessible to animators of all skill levels .
Ease your keyframes in Adobe After Effects quickly with a compact UI that packs a powerful punch despite its adorable appearance. NEW! Clone and paste easing curves. See what makes ARC different than other Copy Ease tools. NEW: Vertical Mode, ARC Keyframes, Clone/Paste and more!
Key Features of Arc 1.5:
- Visual Expression Building: Create expressions without coding by connecting intuitive visual elements, making advanced expression techniques accessible to everyone
- Smart Auto-Complete: Write expressions faster with intelligent code completion that suggests properties, methods, and variables as you type
- Interactive Color Picker: Visually select colors with a live eyedropper tool that automatically inserts the correct color values into your expressions
- Property Linker: Link to any layer or property with a single click using visual pick-whip functionality
- Dynamic Text Widget: Add formatted text boxes for multi-line expressions and comments, with full support for copy/paste from other applications
- Expression Library: Save and organize your favorite expressions in a personal library for quick reuse across projects
- Multiple Workspaces: Create and switch between different expression editing environments tailored to specific tasks
- Error Highlighting: Real-time syntax checking with visual indicators for expression errors before you even apply them
- Quick Math: Built-in calculator for performing complex mathematical operations directly in your expressions
Perfect For:
- Motion graphics artists wanting to use expressions without deep coding knowledge
- Experienced expression writers seeking a more efficient workflow
- Animators needing to organize and reuse complex expression setups
- Teams wanting standardized expression libraries across projects
- Anyone looking to speed up their expression workflow in After Effects
System Requirements:
- Adobe After Effects CC 2015 through 2025
- Windows 10/11 (64-bit) or macOS
- 4GB RAM minimum (8GB+ recommended)
- 50MB available disk space
Version 1.5 Highlights:
- Improved expression engine for faster performance
- Enhanced auto-complete with better property detection
- Expanded library features for better organization
- Bug fixes and stability improvements over previous versions
Note: Arc is designed to work alongside other expression tools—it doesn’t replace or conflict with existing expression functionality in After Effects .
One slider with many possibilities.

Ease – Ease in and out all selected keyframes.
Ease Out – Only change the ease out value of selected keyframes.
Ease Out/Zero – Changes the ease out value and sets the ease in value to an influence of zero.
Ease In – Only change the ease in value of selected keyframes.
Ease In/Zero – Changes the ease in value and sets the ease out value to an influence of zero.
Linear – Changes all selected keyframes to linear keys.
To access the help document, press CTRL + ALT + SHIFT + Button.
Quickly switch between easing modes using keyframe modifiers. The dynamic HUD displays the current easing mode.

All keyboard modifiers work by utilizing the slider or by clicking the influence percentage icon. Clicking the icon makes it easy to apply the same value to another set of keyframes.

NEW! Version 1.5 has added a vertical mode for easing that allows for the middle of the curve to be the slowest.

NEW! Version 1.5 allows for easing curves to be copied and pasted. Paste ease in, ease out, ease in and out, or keyframe values only.

Aren’t there other tools that already offer copy and pasting ease data? Yes, but ARC takes into account the keyframe values and maintains relative direction so curves are accurate regardless of value changes. Watch the video “What’s new in ARC 1.5 for more examples of optimizations in the copy/paste feature.

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