Hi Callie,

I think "Imagemap" is discontinued for 7.5 and later versions of Episerver.

https://world.episerver.com/forum/developer-forum/-Episerver-75-CMS/Thread-Container/2014/6/ImageMap-for-75/

And to enable "HTML" tag you need to enable it in initialization module.

 [InitializableModule]
    [ModuleDependency(typeof(TinyMceInitialization))]
    public class TinymceCustomInitialization : IConfigurableModule
    {
        public void ConfigureContainer(ServiceConfigurationContext context)
        {
            // browser console to see settings: window.tinymce.settings;

            context.Services.Configure<TinyMceConfiguration>(config =>
            {
                config.Default()
                    .AddPlugin("code");
        }

        public void Initialize(InitializationEngine context) { }

        public void Uninitialize(InitializationEngine context) { }
    }