Question regarding button on game pad layout

[Android Central Question]

I recently started playing Final Fantasy VII for Android and I noticed that there are 2 buttons at the bottom of the screen. One says "Encounters On" which I know what that does, but the one to the right of it simply says "A" and when I press it, it changes to "D". Anyone know what thus button does? I'm at a loss for what it does.

 

[mustang7757]

See if any members that play the game can help

I'll leave a Link to register so you can communicate here , As a guest account you can only post questions but can't reply.
https://forums.androidcentral.com/showthread.php?t=409154