Reading Plans Master Calendar?

Documents>Reading Plans

Documents>Reading Plans

I understand how to access and view my reading plans. I want to know if there is a way to view multiple reading plans in the same calendar window, like combing the two below.

I want to know if there is a way to view multiple reading plans in the same calendar window

No. I am unsure if you can add readings from two different resources to a reading plan manually. if so, you could have ONE reading plan that did something similar. Presumably, however, you did not make manual "readings" but rather allowed Logos to create each reading. 

I understand how to access and view my reading plans. I want to know if there is a way to view multiple reading plans in the same calendar window, like combing the two below.

Yes. Add the individual Plans to a Custom Reading Plan:

Use the Add menu and select the Starting Date for each Plan  (Add a Reading Session to...)
Ensure the Read Starting... date is correct.

I started my second plan on Dec 2, giving an unnecessary overlap of readings, but it demonstrates how Plans with overlapping dates would look.

When complete, switch to Calendar view.