Press

(space)
to complete words.
Pressing space indicates that you have finished typing your word. The
predicted word corresponding to your keystrokes will appear on the screen.
Press

to
select alternatives.
The next key is used to select alternatives.
Next can be used before or after
pressing space.
Tip: Pressing
(previous) displays alternatives in reverse order.
Tip: Long-pressing next or
previous brings up a list of available alternatives.
Press

(tab)
to auto-complete words.
Typing several letters often generates auto-completion suggestions which appear
on the screen in gray. To accept the suggestion press tab.
Tip: Auto-completion suggestions can be turned
on and off from the Tio Settings menu.
Press

(space)
to auto-correct words.