Update README.md.

README.md

@@ -15,6 +15,8 @@ Press: <kbd>-</kbd> to remove a column<br>
 Press: <kbd>Backspace</kbd> to go up the directory tree<br>
 Press: <kbd>Enter</kbd> to enter a directory<br>
 Press: <kbd>CTRL</kbd>+<kbd>r</kbd> to refresh the view (if files have been added/removed from the directory)<br>
+Press: <kbd>CTRL</kbd>+<kbd>h</kbd> to hide/show hidden files<br>
+Press: <kbd>CTRL</kbd>+<kbd>f</kbd> to hide/show files<br>
 Use the arrow keys to move the cursor.<br>
 Press any letter/number on the keyboard to jump to the first file that starts with that letter/number.
 Press: <kbd>ESC</kbd> to open a `Bash` shell in the current directory<br>