How to use an image to open the lightbox form?

2. Im not a coder, but if we use lightbox, i'd like to link lightbox to an image. Can you recommend what code I would use to link an image, click, that pulls up the lightbox?

Please kindly follow the guide below in order to find the steps about how to use an image as button: https://www.jotform.com/help/220-How-to-Create-a-Lightbox-Form 

I hope this helps. 

Thanks.