duplicar screen (double screen)

As doubled the screen

Try this method proposed by Scott:  you can copy a 

screen using one of these methods https://groups.google.com/forum/#!searchin/app-inventor-developers-library/copy $20screens

Then delete the blocks in the copied screen that you don't need.

or  ========================

AI2 Merger Tool ...   http://appinventor.mit.edu/explore/resources/project-merger-tool-combine-two-app-inventor-

projects-one.html

=============

or do not copy at all but code smart:  

• Building apps with many screens