Is there a way to set the guideline colour using more than just 2 colours It would really help me to use 3 colours.
Yes, CorelDRAW is friendly in this issue:
1. Select guideline that you wish to change color, and Double click on it.
2. Guidelines Docker arises.
3. Pick a new color.
4. Click on Modify.
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Another method (easier and faster):
a. Select the guideline.
b. Right click on the color palette (Docker is not necessary),
Ah thank you I had been trying for ages