Hi Lucien, that only can be possible in encoder mode.
Usually all DAWs support a precision mode, with some custom hotkey and some VSTs support the same, usually is with key shift.
That mode can be used with combination of mouse xtrabuttons, and is named ultra.
When is enabled you have higher precision, when is disable you have normal precision.>
Depend of the DAW and VST you use.
What is your DAW?
In mouse mode there is no way to do a universal high precision mode.
Anyway tell me more about your setup, the software you use, etc.