Acer B1-721 - Manual (Page 17)

Using your tablet - 17
The onscreen keyboard
When you tap a text box to enter text, an onscreen keyboard will
appear. Simply tap on keys to enter text.
Tap the ?123 button to see numbers and special characters, and then
tap the ~ \ { key to see more options. Tap and hold a key to select
alternative characters (if available for that key), such as letters with
accents or related symbols.
Changing Google keyboard settings
To use a different keyboard language or change settings, tap
the Input options key, then select either Input languages or
Google keyboard settings. These settings include Auto-correction
and keyboard sounds.
Predictive text or auto correction
The Google keyboard can provide predictive text input. As you tap the
letters of a word, a selection of words are displayed above the
keyboard that continue the sequence of letters tapped, or are a close
match allowing for errors. The word list changes after every key press.
Note
The layout of the keyboard varies slightly, depending on the application and
information that is required.