What you are seeing is the Transparency Grid.
View > Show/Hide Transparency Grid.
However, if you hide the transparency grid, you might be under the false impression that your artwork has a background, which it doesn’t.
If you want a background, you have to add it. Otherwise, you will have transparent areas in your art, which might be good for a title roll, for instance.
Also look at View > Show/Hide Artboards.
If you have snapping enabled, you can easily create a background with the Rectangle Tool.
Further, if you create a document with the base components that you like, you can add that to your templates folder, thereby making your updated template a template that’s available to illustrator.
Another note, those safe guides were deprecated in 2010 by the National Association of Broadcasters…
https://www.nab.org/xert/scitech/pdfs/tv031510.pdf
So, that might be another reason to create your own template.
Vince
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