Screen templates are a crucial part of any app or web site design.
They are the top level outlines of the architecture of a screen stage or a page.
Much of the Design Thinking process is marrying up the big picture with atomic particles that make it up and vice versa.
Ideate all the time and lots to explore many different possibilities in each realm to discover the most optimal solution.
It is quite an evolutionary process of thinking, but evolution leads to a revolution.
Bit by bit we make it happen.
Don't lose the sight of the big picture.