My keyboard emoji page is stuck at full height and wont minimise to half size, any ideas?

[Android Central Question]

I went to open my key board and held down on what I thought was a blank space on the phone but it enlarged my emoji keyboard face but not my standard letter keyboard.. there isn't a clear arrow or swipe method to resize the keyboard but I have tried all keyboard settings to try re-adjust.

 

[B. Diddy]

Welcome to Android Central! Which phone, and which keyboard app?