Scrollable Option not available for Dynamic Text

[MRobbins85]

Creating an HTML 5 banner ad. I created a text box, filled it with my content, and changed it from 'Static' to 'Dynamic'. For some reason the 'scrollable' option isn't highlighting. Am I missing a step to activate this functionality? 

[kglad]

it's not a canvas option.  you'll need to code that yourself.

http://jefferywright.com/2018/10/easy-scrollable-interactive-dynamic-text-animate-cc-html5/