What kind of plot do you want?

Do you want curves (listplot) of the real and/or imaginary parts separately? Do you want a pointplot of the pairs of real and imaginary parts of each number? Something else?

If I've made a mistake and offended anyone then I apologize. I won't touch any Question of the OP.

@chri69a9 I used a mix of using an external editor vi on the .mw file (to remove invalid Equation XML elements) and Open/Save using Maple 2023.0.

If you are using the green up-arrow and the Upload button in the popup dialog then you also need to use either the Insert Link or Insert Contents button within that same popup dialog.

What point is being made by this posting that would not be more appropriate as further discussion of this previous thread started by the same person?

@C_R This is somewhat misleading because you are using 2-argument eval which does a substitution. That is significantly different from the OP's approach of using actual assignment of the parameters, and 1-argument eval merely as an attempt to force re-evaluation.

There are lots of ways to get the desired result, and you've shown one. That is fine. But what you've stated is not an explanation of the OP's issues.

And your statement, "If you want to use eval you have to load the Standard package." is false. The substitution approach that you showed for Units:-Standard also works for Units:-Simple.

Download Units_simple_not_simplified_ac.mw

Please stop posting completely separate new Question threads on this example.

Instead, add your close followup and related queries on this example to one of your earlier Question threads on it.

Try to fully characterize precisiely what you're trying to accomplish, and what would be acceptable to you as a solution.

Please stop posting completely separate new Question threads on this issue.

@minoush82 Please stop posting completely separate new Question threads on this topic.

You wrote, "specific width", and you also wrote, "10 characters".

But ten characters does not have a specific width in general, if you're not using a fixed-width font.

Please don't spawn a completely separate new Question thread for this.

You could add your followup details here.

If you have followup queries or additional details about this example then please add them here instead of spawning wholly separate new Question threads.

@zenterix 

As I wrote, it is tricky to do programmatically in general.

The act of trying grid=[1000,1000] strikes me as a bad idea, since it'd place a large burden on the GUI's 3D plot renderer which also allows things like manual rotation, etc.

@Carl Love I also turned off "Check for Updates" and anything else in the Network tab. Since I did that (last week) I didn't see a hang.

However, it's also possible that someone might have fixed a misbehaving backend server.

@Carl Love Thanks.

This is slightly simpler syntax,

plots:-display(
 plot3d(f, x=-1..-y^2, y=-1..0),
 plot3d(f, x=-y^2..0,  y=-1..0),
 plot3d(f, x=0..y^2,   y=-1..0),
 plot3d(f, x=y^2..1,   y=-1..0),
 plot3d(f, x=-1..-y^2, y=0..1),
 plot3d(f, x=-y^2..0,  y=0..1),
 plot3d(f, x=0..y^2,   y=0..1),
 plot3d(f, x=y^2..1,   y=0..1));