My new Gmail inbox is hiding emails. How can I prevent this?

it's not hidding its a new way to orginize your inpox

the new gmail inpox puts your e-mails in categories for example (primary - social - promotions)

and automatically arrange the incoming e-mails into these categories.

in your inpox it looks like explorer tabs try finding it

if you want to go back o the ordinary view of your inpox go to settings and then configure inpox then chose primary only.

hope this helps you