Proficiencies & Training Question

Hi Everyone,

I am using the online character sheet. My DM granted me the heavy armor proficiency, but it is not an option. Is there a way to add it that I am missing? Or can I request this be added?

Thank you.

Thanks for the quick reply. I am using the website and did find that I could add the individual armour types. It seems that the only way to get the heavy armour proficiency is through the feat, but that adds +1 to Strength. 

I wonder if armour classes (light, medium & heavy) could be added by the Developers?