+* ```del 12```will delete thw tweet with *[id=12]*.
+
+* ```s #noah```will search the word *'noah'*. Result will come back with highlight.
+
+* ```fr```will list all friend (You are following people).
+
+* ```fl```will list all follower.
+
+* ```h```will show the help.
+
+* ```c```will clear the screen.
+
+* ```q```will quit.