How can I change the apparent default values of the Zoom Indicator at the bottom right of the Modelspace screen to even values like 40%, 60%, 100% etc?

How can I change the apparent default values of the Zoom Indicator at the bottom right of the Modelspace screen to even values like 40%, 60%, 100% etc?

Zoom indicator value can  change through mouse wheel scrolling.
We can not enter input zoom indicator value.In 2018 build this improvement will implement.

How can I change the apparent default values of the Zoom Indicator at the bottom right of the Modelspace screen to even values like 40%, 60%, 100% etc?

What version are you using?

In 2017 there is a "zoom factor' in the 'advanced preferences"
If
Current zoom is @ 12%
Target zoom is 100%
Set 'zoom factor" @ 8.333333
Click once on the "zoom in" tool icon.

If
Current zoom is @ 100%
Target zoom is 20%
Set "zoom factor" @ 5
Click once on the "zoom out" tool icon

I have my "Zoom / Printed Size" set with "1" as its hotkey. This will zoom the drawing to 100%. From there I'll move the cursor out of the drawing area and use the +/- numeric keys to zoom in/out. As Dean shows, the "Zoom Factor" can make difference on the amount of zoom for each plus/minus movement.