For CM9/CM10 user Download (thanks to inwepo)
i assume that you have installed the BBM, as you can see there is no key for entering new line, it's replaced by "send" key on keyboard..
if you want to replace the "send" with "enter" key, do the following:
-install xposed installer on your device, go to this Thread
-open the app, and choose "install framework"
-then install the module(apk), and the xposed should recognize it. Download module in attachment
-and you'll have the "enter" key on BBM.
Thanks to inwepo, and rovo89
PS: the keyboard module is not for GB rom, as the xposed is only for 4.0+