Or maybe this info can help. For some fonts you have to set the CHARACTER SET set to DEFAULT:
michiel, 4 years ago
liuyongcai 我是打中文，使用字型出來都變成亂碼！
KIMTW, 4 years ago
michiel 我有使用DEFAULT，但還是顯示不出來，在設定視窗中可以清楚看到文字顯示正常，但進入編輯視窗，就顯示不出來
KIMTW, 4 years ago
Maybe the font you are using does not feature the required glyphs.
Which text and which font are you using?
michiel, 4 years ago