In '.vimrc Setup' section, in place of this:
"" only show completion as a list instead of a sub-window
"" no preview window after completion
For more options, check: https://github.com/Valloric/YouCompleteMe#options
C. Lange, M. Kerber, and C. Rowat. (2013)Tutorial at INFORMATIK 2013, Computer science adapted to humans, organization and the environment, 43rd annual meeting of the German Informatics Society (Gesellschaft für Informatik e.V. (GI)).