Hi yaschan,
Thanks so much for your report, and welcome to the forum!
The style manager was only recently introduced – what you see in the Academy (videos and screenshots) is probably just the theme styles, which are now also located in the style manager. We are already working on an Academy relaunch, during which we will also update the screenshots and videos.
Regarding the width: Click the eye icon to activate the canvas preview. This minimizes the settings panel and gives you the added benefit of a live preview.
If you have specific suggestions on how we can reorganize all panels in a meaningful way, please let us know here:
Best regards,
timmse
