Blueprint for box triggered

I need a little help, since I do not know how to make a condition so that when I go through a box trigged my character jumps down by pressing a key and if it does not press it does not jump.
I would greatly appreciate the help.

You need someking of variable in your character, I would make a bool called EnableJump. Check it before pressing your jump button.

When player enters box trigger event OnActorBeginOverlap is used. Then you need to cast the character from this event to your character class and just set the variable that you created in your character blueprint.

If you want to block jump again after the character is out of trigger box, then unset variable in event OnActorEndOverlap

Could be more specific, please?
Is that I need the character can only press the jump key in the box trigged and if you do not press it do not jump.

It is not like you can forbid the player to press a key on his keyboard. You gonna steal him this button and don’t let him press it? xD

You need to know when player presses Jump Key, then check if he can jump.
The simple variable CanJump will do the job.
Let this trigger box, it have to be in blueprint, set this variable CanJump to true. And that is all

All I want is that I can only press the button to jump when it’s on the box trigged.