How to undo/redo typing?

[123imee]

I can't seem to find this function during texting and while in Memo.

please help!

[Echo1]

on the keyboard there is a pencil with a white x on it use that it will delete the last typed letter....

[123imee]

I'm looking for the undo / redo function.

[Link1]

no undo redo only in email through the provider, you must kick it old school and cut/copy and past

[Firetyper]

I don't think "Redo/Undo" is an available feature.