Now I am habituated to use CTRL+R to see the code in full screen because it allows me to hide the result or message pane from windows. Working on SSMS for Development or testing any TSQL procedures I like too much and I am using this tool since 4 years.
But last month I was installing SQL SERVER 2012 web edition, CTRL+R was not working. I surprised where it has gone. I bothered few days but I fixed soon. To fix I issued from below process.