Adobe After Effects - Manual (Page 310)

Clone Source
Clone Position
Clone Time
Clone Time Shift
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Note:
Each clone stroke includes properties in the Timeline panel that are unique to the Clone Stamp tool and correspond to settings made in the Paint
panel before the clone stroke is created:
The sampled layer.
The (x, y) location of the sample point within the source layer.
The composition time at which the source layer is sampled. This property appears only when Lock Source Time is selected.
The time offset between the sampled frame and the target frame. This property appears only when Lock Source Time is not
selected.
After clone strokes have been created, their properties in the Timeline panel can be modified and animated. For example, you can clone a bird
flying across the screen by cloning it in one frame, tracking the motion of the bird, and then linking the Clone Position property to the Attach Point
property of tracker with an expression.
You can set a blending mode for clone strokes, just as for other paint strokes. For example, consider using the Darken blending mode to
remove light-colored scratches, and using the Lighten blending mode to remove dark-colored blemishes and dust.
Work with clone presets
Use clone presets to save and reuse clone source settings: Source Layer, Aligned, Lock Source Time, Source Time Shift, Offset, and Source
Position values. Clone presets are saved in the preferences file, so they can be reused in other projects. To work with clone presets, first select the
Clone Stamp tool.
To select a clone preset, press 3, 4, 5, 6, or 7 on the main keyboard, or click a Clone Preset button in the Paint panel.
To modify a clone preset, select it and adjust the Clone Options settings as desired.
To copy the settings from one clone preset to another, select the clone preset from which to copy, and Alt-click (Windows) or Option-click
(Mac OS) the Clone Preset button for the clone preset to which you want to paste the settings.
Eraser tool
If you use the Eraser tool in Layer Source & Paint or Paint Only mode, it creates Eraser strokes that can be modified and animated. In contrast,
using the Eraser tool in Last Stroke Only mode only affects the last paint stroke drawn and does not create an Eraser stroke.
To temporarily use the Eraser tool in Last Stroke Only mode, Ctrl+Shift-drag (Windows) or Command+Shift-drag (Mac OS).
1. Select the Eraser tool from the Tools panel.
2. Choose settings in the Paint panel.
3. Select a brush in the Brushes panel, and set brush options.
4. Drag through the area you want to erase in the Layer panel.
Each time you release the mouse button, you stop drawing a stroke. When you drag again, you create a new stroke. Shift-drag to resume
drawing the previous stroke.
If you use a pen tablet, pressing the eraser side of the pen to the tablet temporarily activates the Eraser tool.
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