Simple Question (How to flip horizontal on new tile system)

Hi, simple… how can I flip a selected tile(group)? on the grid or in the palette, anywhere that works, I´m hours searching how to do this most simple thing in any tile system…

Thanks a lot in advance

Using unity 2017.2.0.f1

Pick a tile or tiles from palette or scene, press the hotkeys [ and ] to rotate or ALT-[ and ALT-] to flip, then paint again.

Note: If you used early previews, your hotkeys might be saved into preferences as x, y , and . because we changed them recently.

@keely This seems to be a bit broken to me on 2017.2f3. i.e. if I paint a tile and then can’t rotate it anymore. I have to reselect it from the palette again and then rotate. I can’t also pick a tile from the scene view and rotate.
It seems that once the SceneView is in focus I can’t rotate (I get a “clunk” sound from the system).
Any hints?