browser plugin settings

in the browser plugin settings section theres an option-show safezone controls,what is this do?i read help file and cant find nothing about it?

You are able to switch to safezone from the webrep plugin. See attached. Changes don’t take effect until you have closed and reopened your browser.

thanks for explaining but for me it works on firefox and chrome but its not showing up in ie?

ais 7.0.1407
win 7 64&32