It depends on how you created it and what menu file it was created in.
By default it ends up in the MNS file. The problem is that if the other
system has other such customising in its MNS file, copying this one over
will see its customising lost.
The other way is to copy just the relevant toolbar information from the
MNS file and then edit and insert the changes in it. You will also have
to copy any buttons you have created. These will be BMP files and the
name will be that in the toolbar definition.
It is not that easy for someone who is not into editing the menu files
etc. Unfortunately it never has been a simple task. You might want to
take this opportunity to learn about menu customising and go down the
path of making the changes directly in a custom MNU file. This way you
have full control of the process and it is easier to transfer settings.
The customization is saved in the "acad.mns" file (or "aclt.mns" in LT).
If you did the customization inside AutoCAD, in the default menus,
then all customization made on the second PC will be deleted ...
You might consider making your own menu file.
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