In the left colour window, you will see a selection of colours, displaying a progressive spectrum, varying between the four colours in the four corners of this window. You can change the colours in the four corners as follows:
在左边的颜色视窗内您能够看到四个颜色分级状态，从四个角落的颜色可以清楚识别显示出的颜色。您能够按照下面的说明来修改这四个角的颜色：