With the function "Calculate", a colour transition scale is created, i.e. after creating a start and end colour, the intermediate colours are calculated and entered by the program. To do this, define the start and end colour as described in "Colours" colour. Then click first on the start colour and then on the end colour while holding down the Ctrl key. When the start and end colour squares are marked with a box, click on the "Calculate". The intermediate colours are now calculated automatically.