Huawei G535-L11 - I Installed a New Text Input Method but Cannot Use It. Why; How Do I Change the System Font Size; What Text Input Methods Does My Phone Support

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2.7.2 I installed a new text input method but cannot use it. Why?
After installing an input method, you must select the input method and set it as the default
input method as follows: Go to Settings. Under PERSONAL, touch Language & input. On
the displayed screen, touch Default. Then, select the newly installed input method.
2.7.3 How do I change the system font size?
Go to Settings. Under DEVICE, touch Display. On the displayed screen, touch Font size.
Then, select the desired font size.
2.7.4 What text input methods does my phone support?
Google keyboard and Huawei input method.