Functionality for F1 is added in TTY mode.

F1 is added and fonts was fixed.

Author: RafsanjaniHub

system.md

@@ -36,10 +36,10 @@ user@machine:~$ unity --reset-icons
  
 
 ### 5. TTY Mode:
-#### We can use shortcut key: control + alter + F7    # Try F2, F3, ... F6 (i.e., F2 through F6)
-This shoud bring up a text-based login prompt. Afterward, log in with your username (`whoami`) and password.
+###### We can use shortcut key: control → alter → F7    # Try F2, F3, ..., F6 (i.e., F2 through F6).
+This shoud bring up a text-based login prompt (F2 through F6). Afterward, log in with your username (`whoami`) and password. Keep in mind, F1 is reserved for GUI.
 
-#### We could use terminal or console, if we access via GUI mode.
+###### We could use terminal or console, if we access via GUI mode.
 ```console
 user@machine:~$ sudo chvt 7                            # Try 1, 2, 3, ... 7
 ```