Minecraft - 1.7.10
Forge - 10.13.4.1614-1.7.10
Fullscreen Windowed (Borderless) - 1.7.10 - 1.3.0b

Switch to the game, the game will be the most front. But I want to show up in the front of the window being blocked by the game. There is no problem with maximizing the game window.