Is there a way to remove the "Submit" button from a Drag and Drop?

Hi:

I'm new to Storyline, and have created a drag and drop interaction using the "Remove Freeform" wizard.

I'm not a big fan of the word "Submit" in eLearning, as it's a little too "They Live" for me, so instead, I created an "OK" button and set a trigger to do the Drag and Drop 1 - "Drag and Drop" interaction when it's clicked.

That works fine. My branching for correct and incorrect feedback works as expected, and when "Continue" is clicked, the slide advances to the proper slide.

Through searching this forum, I found that it's possible to turn off the "Submit" button in quiz questions individually, but this isn't a quiz question. It's simply an in-course interaction, but I don't see the options to turn the submit button off. Apparently, this is done in slide settings for quiz questions, but what about in-lesson interactions?

Hopefully, I'm missing something obvious. I'll use the "Submit" button if I can't figure it out, but if anyone here can point me in the right direction, I'd appreciate it.

Thanks!