@Carl Love @Markian Hirnyk Thank you both, I'll do that. It would be great if it could be set as default, but this'll work too.

@Markiyan Hirnyk I'm not familiar (yet) with Maple at that level, I didn't understand what you mean.

What I mean is that for example, in the plot for x^3, the values over the positive R axis (which are positive) appear in cyan, and the ones over the negative x axis are red. The plot for x^2 is cyan over the real line.

I would like to know if there's a way to change all phase colours half a turn and set it as a default.

@Markiyan Hirnyk Yes, that works. As you might have noticed, I'm pretty new to Maple, so I still have to learn many of the basic rules. Thank you for helping a newcomer out!