Check all these
Blocks - attributes
Titleblock
Table style
Multileader styles
There are so many places it could be, try changing the font in that style to something really obvious like 'wingdings' and then look carefully in all your layouts as well. Or post your dwg file so someone might be able to help (but let us know which text style it is)
ご返信頂きましてありがとうございます。
「try changing the font in that style to something really obvious like 'wingdings' and then look carefully in all your layouts as well. 」・・・・フォントを変えるというのは、目で見つけやすいので、良いアイデアですね。全く思いつきませんでした。
早速試してみたいと思います。
Thank you so much for your help and comment!