Trick to use layout as model view

As the layout tabs I'd like to have a multiple model-views tabs.

I can use layouts tabs, I can change the background color to same as model tab and all its ok. 

However I'm unable to set scale to have text and annotation with a "human" size (that is, thinking on my screen and not on the paper).

Maybe this is a newbie question but I'm lost....

What is what I must to set ? I dont want to use layout to print, but to view my drawing with custom layer settings.

Any help ?

Thanks

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