iPad上でPDFを白黒にしたい

Hi @勇太248876232set 

Hope you are doing well.

As per the issue description, you want to convert color PDFs to black n while. Unfortunately, this feature is not available on the iPad Acrobat app. Kindly use the Acrobat Pro DC desktop app. Here is a discussion link you can refer to:

https://community.adobe.com/t5/acrobat-discussions/acrobat-pro-dc-how-can-one-convert-a-pdf-from-color-to-black-white/m-p/7283428

Thanks,

Harsh