In Chat window you can type a message to the chosen contact.
1 - Adaptive typing.
2 - КTo view all history.
3 - To number and signs.
4 - Delete.
5 - Send.
6 - Go to Main screen.
Adaptive typing allows to make your typing faster. To type a word, type its first letters and on the left side of the screen you will see full words that start with these letters. Then you can choose the word you needed.