Maple’s interface->default zoom only lists some values to zoom. For example it does not list
110% or 120% and so on. To make default zoom to something of your choice, on Linux, edit the
file
/home/me/.maple/2025/maplerc and change the line Default Zoom=120 to the value of your
choice.
Better to do the above when Maple is closed (just in case).
Now Start Maple to see the effect.
This is using Maple 2025 on Linux