You may toggle the statusbar by clicking into the text with the middle mouse button and the menu bar with a right click.

The decoration can be toggled with the right mouse button while pressing the control key.

You may add a file by simply dragging it onto ktail or use the menu option and the file selector.

For creating a pipe just choose the menu option "Add pipe" and enter the command as you would do in a terminal.
This is experimental, some commands (e.g. vmstat) do not work with the current method.

The home page of ktail is www.franken.de/users/duffy1/rjakob.