How to add custom internal pages while keeping the Simple login page

In order to add custom pages to your portal, firstly you will need to activate the custom homepage and then, through that menu add the pages that you desire. 
If you just want to add some internal pages but keep the simple login page, you can follow the steps below:
At first select the custom homepage option (1) from under Account and Settings.

Click the Add button (2) to add the pages you want  

and set them to be internal (3) :

Then deactivate the Homepage item on the list of pages (4)

Feedback and Knowledge Base