I have recently migrated to SU2018Pro (from 2017Pro). I have multiple screens and prefer to use one screen (left) all the various dialog boxes.
In 2017 I could create and display trays that contained all the various tool groups (Outliner, Layers, etc.) side by side so that they could all be viewed (and selected) at a glance.
This option is NOT available in 2018. Yes, you can create all the same trays with tools grouped as you like, but these CANNOT be displayed side by side, but are truncated and only available via a tab system.
This is a huge retrograde step and slows functionality greatly.
Ps. … and for what it’s worth the same methodology is employed in Layout as well. Until this is FIXED I’ll be going back to what works (ie. SU2017)
Below are some screen shots of what I’m referring to.