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# Rewiring the RGB Channels

Use the Red, Green, and Blue Channel Rewiring fields to rewire the red, green, and blue channels of an image. Use the Rewire option box to create a monochrome or negative image.

When you rewire a channel, the values for the current colour channel are replaced with those of the new channel. For example, if you select the R G option in the Red Channel Rewiring field, the colour values of the red channel are replaced with those of the green channel.

The RGB Rewiring commands can be applied to the Master range only.

To rewire the red channel:

1. Select an option from the Red Channel Rewiring box.

   Select: | To:
   --- | ---
   | Use colour values for the red channel.
   | Replace colour values of the red channel with those of the green channel.
   | Replace colour values of the red channel with those of the blue channel.
   | Replace colour values of the red channel with the luma of all channels.
   | Replace colour values of the red channel with its inverse. For example, 1 corresponds to the maximum value of the given colour channel. In 8 bits, this value is 255.

2. Click Process to apply the changes to the clip.

NoteThe green and blue channels are rewired in the same way as the red channel (described in the previous table).

## Creating a Negative or Monochrome Image

You can convert a colour image into a monochrome or negative image using the Rewire option box.

TipYou can also convert the image manually by clicking the appropriate Rewire selection box (R, G or B) and selecting the Y option for monochrome or 1- R for a negative image.

To convert a colour image into a monochrome or negative image:

1. Select Mono or Negative from the Rewire option box.

   The image is automatically converted to a monochrome or negative image.

2. Click Process to apply the changes to the clip. To cancel the changes, click Reset Basics.