How To Add Feeds in tt-rss ?

I have installed tt-rss & I couldn't find the way to add feeds. I simply edited tt-rss's feeds & changed with CE, but I would like to add few more like Phoronix,Linuxtoday,webupd8,linux.org,raspberrypiprojects,etc.etc.
But I couldn't find any option ... Can anyone tell me how to add feeds manually ?