I’m not the OP but I assume he is referring to this from the release notes:

Custom Views

Akarsh Simha introduced the ability to orient the sky map to match the view through any instrument.

A view is a collection of settings: the orientation of the sky map, how the orientation changes as the sky map is panned, whether it is mirrored or not, and optionally the field-of-view to set the map to.

If no views are defined, KStars introduces a set of standard / "demo" views by default. Existing views can be edited and new views can be added using the "Edit Views..." interface. They can also be re-ordered in the interface. The ordering of the views in the "Edit Views..." dialog defines the order in which views will be cycled through using the keyboard shortcuts Shift + Page Up and Shift + Page Down. Thus, you can set up the views for easily switching between naked eye / finder scope / telescope views for easy star-hopping.

Furthermore, there is a new option in the View menu that enables mirroring the sky map so as to be able to match the view through an erecting prism used for example on a Schmidt-Cassegrain or Refracting type telescope.

The rotation feature overlay now also marks East in addition to north and zenith, so as to know easily whether the display is mirrored or not.

I also was not able to find it on Mac although I did not look as thoroughly as I might.

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