Are you tired of micromanaging your Gmail inbox ... Has the words field with a label (this example uses "Android Police"). Alternatively, add an email address in the From field, especially ...

for example, denoting each email's attachments, including names and file formats. It's good for those who want to skim their emails and pick out the right one in a hurry. The new Gmail in Default ...

These tend to be program-specific files (for example, .psd files), but you may find that you can preview a limited version of some files. Even among the types of attachments you can open in Gmail ...