In AutoCAD, you can use the mouse wheel to zoom objects on the screen, but the step or speed of zooming is not always acceptable to the user. This is especially true if the objects are very large or very small.
To change the zoom step or speed in AutoCAD, use the ZOOMFACTOR system variable.
Enter the ZOOMFACTOR system variable and specify a value of 15 or 20 instead of the default value of 60.
Zoom in or out with the scroll wheel.
As a result, zooming (zooming) becomes smoother and more accurate.
If you need both precise scrolling with the mouse wheel and long-step scrolling at the same time, create custom buttons on the ribbon panel or toolbar so that you can use them to set specific values for the ZOOMFACTOR system variable.