How to DISABLE TAB button on keyboard while writing a message

[Ard]

Hi,
please how can I disable the TAB button (arrow with a line) during writing a message (as attached screenshoot)? It is incredibly frustrating, my finger memory constantly tapping it instead of the spacebar, I really cannot use the app anymore. In older version there were no TAB button, then I upgraded my phone and Aquamail and cannot  get rid of it.
Thank you very much!

[THS79]

Hello Ard,

I think it is your keyboard and not Aquamail.

Greats,

Thomas

[phred]

I think it is your keyboard and not Aquamail.

This.

AM does not come with a keyboard. It simply uses whatever keyboard you have installed and configured. You need to check it's settings to see if you can remove the key you don't like. If it doesn't offer an option, then perhaps you should look for a more configurable keyboard.