The messages function is a feature that allows you to send private messages to a user you designate in a format similar to e-mail.
Unlike the comments on content, no one other than the sender and the recipient can view the messages they share.
You can use messages to send .jpg, .png, and .gif files that are up to 8 MB in size.
You can send messages that contain up to 10,000 characters. 。
■To send a message from a computer（https://www.pixiv.net/）
■To send a message from a smartphone browser（https://touch.pixiv.net）