Hi, John,
It sounds like you may have accidentally unknowingly changed the keyboard size.
I know there are various keyboards available for Android.
Look for the options/configure icon on the keyboard and see what setting are available. Check through the available options and see if there is an option to change the keyboard size or layout.
Hopefully, this will remedy the issue. This issue is not related to the Googe Docs itself so I would say it is related to a keyboard setting.
For example, I use Gboard by Google, and there is a setting to make the keybords.
Below is a screenshot of my Gboard setting and you can see under layout there are 2 options.
- One-hand mode
- Keyboard height
Both options above will affect the keyboard size.
You will notice I have the Keyboard height set to Mid-tall
I hope this helps,
Ben Liebrand