Cloning is the process of duplicating samples from one part of an image to introduce replicated content for creative effect or to repair the original.
About cloning
The clone source
The Clone Brush Tool copies pixels from one part of an image (or layer) to another. The tool uses a source (shown as a '+' cursor) to clone from; this moves in relation to where the tool is applied with its position being able to be redefined as you clone from different areas.
Before and after cloning. Introducing a cloned object to your image.
The clone source can be one of the following context toolbar options:
Current Layer—pixels on the selected layer only.
Current Layer & Below—pixels on the currently selected layer and any visible layers beneath (including vector objects and the effects produced by adjustment layers).
Layers Beneath—pixels on any visible layer beneath the currently selected layer (including those from any vector objects and the effects produced by any visible adjustment layers).
About healing
The Healing Brush Tool paints samples from one part of an image onto another. It's useful for removing defects and for general photo retouching. In many respects it works like cloning; however, it blends the target pixels with the sample pixels by matching the texture, tone, and transparency of the sample pixels with the target pixels.
Before and after healing of an unwanted line crossing an image. To clone/heal a sample from the current image:
Use the Layers panel to either select an existing pixel layer to copy to, or to create a new pixel layer.
From the Photo Persona, select the Clone Brush Tool or Healing Brush Tool.
The tool uses a soft-round brush by default. To use a different brush style, choose one from the Brushes panel.
Adjust the context toolbar settings.
To define (or re-define) the cloning source, tap-hold (long press) on the area you wish to begin sampling from whilst ensuring that the option key is enabled from the Command Controller or pressed down on your keyboard.
(Optional) Rotate the sample by using the Rotation control on the context toolbar.
(Optional) Set the scale of the sample by using the Scale control on the context toolbar.
(Optional) Transform the sample by using the Flip pop-up menu on the context toolbar.
To clone/heal a sample from the current image: