Hi,
We’re glad that you like Xibo!
At the moment sadly no, I’d suggest making background in some shade of gray 
/darker colour so you will be able to see regions better, and then when everything is set as you want it to be, change background to white again.
Designer will get ‘tiny’ overhaul in 1.8, so it definitely should be better then.
Fun fact - one of my very first posts on this site: