Custom Module -- cannot find the place to create a custom module

Custom Module -- cannot find the place to create a custom module

I can find to "manage a module" but I cannot find the place to "create a module".  We the subscription that should allow us to create custom modules.  Can you please show me how to create a module. 

Thank you. 

Michael Kokernak
Across Platforms, Inc.
www.acrossplatforms.com