(1) Couldyou upgrade to the latest compiler? I have tried it on my machine(12.1) and this option is supported in fact.
Download Latest Products Packagehttps://registrationcenter.intel.com/RegCenter/
(2) You can find all the options supported from the documentation of Composer. (On my machine, it is "C:\Program Files (x86)\Intel\Composer XE 2011 SP1\Documentation\en_US\compiler_c\compiler_documentation_c.htm") Also, here is an online help document of icc compiler:
http://software.intel.com/sites/products/documentation/studio/composer/en-us/2011Update/compiler_c/i... (Click the "Index" button on left-topand you can search your options")
(3) How to insert new line? For me, I can directly click "enter" to insear new line in this editor, I am using IE8. It should be related to browser, I think.
Any issue, please let me know.