How to make terminator transparent?
Right click anywhere in the terminator window and choose "Preferences", your desired option should be found under "Profiles"->Background":
Edit your config file in $HOME like this (i.e. vi) :
vi $HOME/.config/terminator/config
insert into [profiles] [[default]] the transparency settings:
background_darkness = 0.97 #(or anything else between 0-1)
background_type = transparent
this works for me.