@dharr It is true that sometimes, I do have the problem of a formula that becomes numbers when I want the equation. Then I have to go tho the palettes "Variable" to unassigned it. Your comments sound right to me. So I will use eval as acer talked about it. You have convinced me to the advantage of using it. Thank you for making me rethink this.

@acer Thank you acer for this tip too. I can always count on you. Maybe I could send you my question directly to you :-)

I know, the others deserve to learn too!

@acer Thank you for your help. I love this solution:

that make me learn a new trick in Maple. Then I do the because I am too lazy to write "eval" all the time.

Thank again acer!

@dharr Thank you for taking the time to help me solve this.

@Kitonum  Thank you!

@dharr Thank you for the command from plots. I also tried this:

>FunctionAdvisor(plot, Zeta)

which give you the plot from FunctionAdvisor without loading anything. But the inability to exract the command in a cell is bizarre. The closest I come is by doing this:

>plots_Zeta := MathematicalFunctions:-Get(plot, Zeta)

>plots_Zeta[2][1]

Which give the plot I was looking for. But again, cannot ge the commands. If I could send this plot to the PlotBuilder, I could see those commands.

But at least, you help me discover a new world to explore. Thank you.

@Scot Gould That is what I would do because the Mac environment is unknown to me. Happy to know that it serve to someone.

@Scot Gould

In the video, it is very clearly said to create the "Users" directory. I simply missed that because I was opening the maple initialization help page while listening to the video. My mistake, of course.

Thank you for your help Scot

@acer You are making me regret to have moved from Ubuntu to Windows.

But I don't have any "maple.ini" file elsewhere. What I noticed is that the file's name is "Maple.ini," with a capital M. Which is the preferences file as you duly noted.

Do you think that this means that I should create a blank "maple.ini" file, write the three setoptions lines and save it at this location: C:\Program Files\Maple 2024\lib\maple.ini ?

Because there is no "maqple.ini" file in the \lib folder neither.

Thank you acer for your help.

@Carl Love But as I told Scot, it seem that there something to do.

@Scot Gould Thank you Scot for your answer.  There are a lot of interresting stuff on your website.

In my maple.ini file, there are already a lot fo things.  But no plots:-setoptions(). So I think that it must be OK to put it at the beginning of the file like that:

But it does not work. The file was located at:

C:\Users\<....>\AppData\Roaming\Maple\2024\Maple.ini

It is nowhere else. Do you have an idea of what is happening?

@acer This is something that I will put to execute at the start of a blanck document. This is what I wanted. You have already done the works needed for the developer of the next release of Maple. :-)

Thank you very much acer

@Carl Love Thank for your response. And sorry for my precedent mixup.

As anames](user) noticed, I did mixup "assumption" with "assigment". The initial question was right and the answer of dharr 6671 is exactly what I needed. Thank you for your kind help.

@Carl Love  I define two objects:

>a:=2;

>b:=sin(x);

>about(indices(`property/OrigName`));
Function about:  describe what is known by assume about
######## ######  an object or a property

INPUT:  an arbitrary number of objects or properties

For example: about( x );
             about( LowerTriangular, UpperTriangular )

This is not what I want. I want to know what is the value of "a" and "b" when I am at the bottom of my worksheet and I cannot see what  I have defined.

But thank you for those commands.