If you want to have calligraphy fonts in the input method, the premise is that the calligraphy fonts you need are installed in your computer.
If you are using the Sogou Pinyin input method, right-click the input method status bar and click "Set Properties" in the first line of the option, and a property setting panel will appear. Select the boxes of "Appearance"-"Skin Appearance" and "Reset Font", and then select the installed calligraphy font you want.