What are those gray icons?

[CannonFist]

When I press an icon along the bottom of the screen a larger version O the same icon appears in the center of the screen. How can I turn this off? Thank you!

 

[carolineM]

When I press an icon along the bottom of the screen a larger version O the same icon appears in the center of the screen. How can I turn this off? Thank you!

Can you be a bit more explicit? Which screen are you referring to? Which App? A screenshot would help.