If you installed a third-party input method or keyboard, turn it on first to be able to see it in the input method selection menu from the Notifications panel.
Turn on the third-party input method from the app that you installed.
Or go to Settings, and then tap
Language & keyboard. Under
Keyboard & input methods, tap the
On/off switch of the third-party input method.
Open the app that you want to use for entering text.
Tap the area where you want to enter text.
Slide open the Notifications panel, tap
Choose input method, and then choose whether to use
HTC Sense Input or the third-party input method.