Question: enb how to disable letterbox?
Answer: To enable/disable letterbox, and adjust its height, open up the in-game ENB GUI (hit ~ for console, then SHIFT+ENTER to bring up the GUI). In the "Shader parameters" window click on the "EFFECT. TXT" window to expand it. At the very bottom you will see the "enable letterbox bar" and "letterbox bar - height" values.