1. Box contour divider
This option can be switched on and off having selected box contour for display. A system of lines will be placed on the grid displaying the transition between the colours.
2. Transparency
Used in connection with background overlays the value defines the transparency of the layer.
3. Copy Colours
The colours indicate the values in the cell.
4. Copy Colours with Transparency
The colours indicate the values in the cell, one colour is fully transparent (usually white).
5. Blend colours
All colours are transparent with a user-defined transparency (secondary option 2) and one colour is fully transparent (usually white).