I think now the 'screen' is more platform independent term. Here is citation from some web resource which seemes to be relevant:
An output screen is a device used to display output. An output screen could be a separate monitor or another display device used only to display the output being received from the computer or other devices.
Aim for as few patterns as possible, applied consistently across the application.
Assuming your original design (the Signup wizard) has been tested, and meets the acceptance criteria (success metrics) for your app, you now have a pattern which helps a user:
navigate a series of meaningful steps and inputs which rely on a specific order (either for ...
You can reference the "Contained collections" section of the Material Design component guidelines for "Cards" to find your answer:
"Card collections can be placed within a container, and be scrolled within it." (the example is horizontally scrollable).
Email address is a common input field these days. We see it on login forms, register forms, ... .
I think placeholder for email address field is good and clear enough even for below average users these days!
By itself, it doesn't make sense for a new user to be shown an input mask for an email. Their email may be from any domain and extension, so an @ mask is actually a deterrent since most people expect to type it and probably will type it. So now you need to expect an @ symbol and move the cursor to the next field seamlessly.
For a returning user, it is ...
You can see that at multiple parts:
When to use - Table
Priority: Low priority
Priority: Prominent, medium priority
Priority: Highest priority
Source: MD Usage -> When to use
As it is writte, a snack bar has low priority. MD also tells you to use Alerts if you need to use a icon....
Yes, today there are hundreds of studies on the prevention of confusion following the use of virtual or augmented reality. My favorite is "adding a virtual nose" to a virtual reality simulator. apparently, adding a steady nose helps to maintain the gap between your eyes and your vestibular system (in your ears).