An advanced search button using gmail operators is set up on the side of the search box.
Unread mail, archived mail, attached files, image files, and the office document files, are searched by one click.
In addition, by pushing these buttons when the usual gmail-search result or your label is displayed, you can narrow it.
A slim button is used for reset.
Each button changes the search result into an opposite one when pushing again.
ex) unread -> read -> unread ->,,,,
Only in japanese, you can search the mail from cellular phone.
