Gamification - Hold down button to repeat action e.g. walking

Hi Heroes,

I'm looking into developing a sidescroller style game in Storyline.

I've been able to set up a scenario where the player moves left and right when the user presses those keys on the keyboard.

Is it possible to configure the triggers in any way (or by any other method) to enable the user to hold down the key to continue walking? So that they don't have to press a button repeatedly in order to move forward?

Many thanks in advance!