Square Corner Button Styles in Storyline 360

See under Insert> Button. The button style at the top now has square corners.

Hmmm. ok, looks like I misunderstood. I thought this meant player buttons.
The same thing was easily accomplished in SL2...

That's correct.

It is so strange that Articulate build a beuatiful player for Ipad and did not give us the ability to deside if we like a different button style than the preeset. It is just a simpel number in Border radius in the css that we need to be able to change in the player settings. 

Hi Susanne!  Thank you for chiming in.  It sounds like you'd like the ability to customize the responsive player design.  I've submitted a feature request for you to our product development team, and you'll probably receive an email confirmation.  Glad to hear your thoughts!