Once you define the softness range, you can set the tolerance range to remove the greys outside the key shape. The maximum and minimum tolerance values define the range of colours to be keyed out in the key-in clip. To set the tolerance, you can use the colour picker, the numeric fields, or the Master Tolerance field.

To set the tolerance range using the colour picker:

1. Click Tolerance.

   The cursor changes to a colour picker.

2. Drag the colour picker around the area of the image that you want to key out.

   The colour values that the colour picker samples are used to set the maximum and minimum values for the tolerance range. The white lines define the limits of the tolerance range. All colour values between the white lines are extracted from the key-in clip.

   
   

   (a) Minimum Tolerance field  (b) Master Tolerance field  (c) Maximum Tolerance field  (d) Tolerance range  

3. To increase or decrease the tolerance range, click the + or - button beside the Tolerance button.
   NoteAn alternative method of setting the tolerance range is to press Ctrl and draw a rectangle in the area of the image you want to key out.

To set the tolerance range using the numeric fields:

1. Set the minimum value for the tolerance range using the Minimum Tolerance field on the left side of the colour bar.
2. Set the maximum value for the tolerance range using the Maximum Tolerance field on the right side of the colour bar.

To set the tolerance range using the Master Tolerance field:

1. Set a value in the Master Tolerance field.

   The value is added to the existing tolerance value of each channel. The Master Tolerance field is reset to zero after you set the value.