Properties¶
Header¶
Compositing Specific Options.
- Use Nodes
 - Enables basic compositing set up with a Render Layer Node and a Composite Node.
 - Backdrop
 Enables the use of a backdrop using a Viewer Node.
- Backdrop Channels
 - See below.
 
- Auto Render
 - Re-render and composite changed layer when edits to the 3D scene are made.
 
Backdrop¶
Reference
Panel:    
Backdrop Options.
- Backdrop Channels
 - Set the image to be displayed with Color, Color and Alpha, or just Alpha.
 - Zoom
 - Sets how big the backdrop image is.
 - Offset
 - Change the screen space position of the backdrop,
or click the Move button, or shortcut 
Alt-MMBto manually move it. - Fit
 - Automatically scales the backdrop to fit the size of the Node editor.
 
Performance¶
Reference
Panel:    
Performance Settings.
This panel help you to tweak the performance of the compositor.
- Render
 - Sets the quality when doing the final render.
 - Edit
 - Sets the quality when making edits.
 - Chunk Size
 - Max size of a title (smaller values give a better distribution of multiple threads, but more overhead).
 - OpenCL
 - This allows the use of an OpenCL platform to aid in rendering. Generally, this should be enabled unless your hardware does not have good OpenCL support.
 - Buffer Groups
 - Enables buffering of group nodes to increase the speed at the cost of more memory.
 - Two Pass
 - Use two pass execution during editing: first calculate fast nodes, the second pass calculate all nodes.
 - Viewer Border
 - This allows to set an area of interest for the backdrop and preview.
The border is started by 
Ctrl-Band finished by selection of a rectangular area.Ctrl-Alt-Bdiscards the border back to a full preview. This is only a preview option, final compositing during a render ignores this border. - Highlight
 - Highlights the nodes that are being calculated by the compositor.