How to increase jump height while holding a button

Hi everyone! I want to make character jump higher (with no limit) till player holds a button. In Blueprints (no C++): hold button = higher jump.

theres a option in the character movement component that i believe is called max jump hold time or something similar. it allows your character to continue going upward until you specify it to stop (stop jumping node for example). its basically your classic jet pack system.

the option is actually located in the character class defaults and is called jump max hold time.