I just fell across this feature in the SUP Hybrid Web Container designer (the XBW file designer). It is Arrange All – I know we get this for free from GMF/GEF and it has been there for ages, but I never noticed it. This solves one of those items I had on my whiteboard to investigate and address (in my copious spare time…).
Basically, right-mouse on the design surface and choose “Arrange All” in the context menu. There is a smooth slide where the screen nodes move into (usually) pleasing positions.
First – the original flow designer….
And – after the “Arrange All” action.