Effects and Tools Reference > Keyer Luma >

# Keyer Luma Menu Settings

## General Settings

Image Type box
  Select the type of image data that is input into the node or tool. This determines the type of transformation applied to the input clip.

Master Tolerance field
  Displays the value added to the existing tolerance of each channel. Enter 100 for an entirely opaque matte.

Master Softness field
  Displays the softness. Drag left or right to adjust the percentage value or enter a new percentage value.

Relative To box
  Select to calculate softness and tolerance ranges relative to 0 and 1 colour values, or relative to the maximum luminance.

Relative To field
  Displays the maximum luminance. This field is active if the Maximum Luminance option is selected in the Relative To box.

Get Maximum Value button
  Analyses the image to determine the maximum luminance value.

Plot button
  Activates the pick cursor. Use to sample an area of the image to display its colour value.

Frame option box
  Select whether to frame the histogram based on minimum and maximum slider values, the full range of histogram values, the plot and reference colours, or the [0:1] vertical and horizontal range (Home).