Main Menu

Hy, I am new in ue4. I created the initial menu of the game, but when I launch the game, the mouse cursor disappears. I do not know why. Help???

Probably cursor is hidden by default. You can change it in your Player Controller blueprint (*Class Defaults *tab, *Mouse Interface *category).
You can also manipulate it on runtime changing ShowMouseCursor variable in PlayerController blueprint.

Check this script, it should help you: