Photoshop

Set file saving preferences

  1. Do one of the following:

    • (Windows) Choose Edit > Preferences > File Handling.

    • (Mac OS) Choose Photoshop > Preferences > File Handling.

  2. Set the following options:
    Image Previews
    Choose an option for saving image previews: Never Save to save files without previews, Always Save to save files with specified previews, or Ask When Saving to assign previews on a file-by-file basis. In Mac OS, you can select one or more preview types. See “Mac OS image preview options,” below.

    File Extension (Windows)
    Choose an option for the three-character file extensions that indicate a file’s format: Use Upper Case to append file extensions using uppercase characters, or Use Lower Case to append file extensions using lowercase characters.

    Append File Extension (Mac OS)
    File extensions are necessary for files that you want to use on or transfer to a Windows system. Choose an option for appending extensions to filenames: Never to save files without file extensions, Always to append file extensions to filenames, or Ask When Saving to append file extensions on a file-by-file basis. Select Use Lower Case to append file extensions using lowercase characters.

Mac OS image preview options

In Mac OS, you can select one or more of the following preview types (to speed the saving of files and minimize file size, select only the previews you need).

Icon
Uses the preview as a file icon on the desktop.

Full Size
Saves a 72‑ppi version of the file for use in applications that can open only low-resolution Photoshop images. For non‑EPS files, this is a PICT preview.

Macintosh Thumbnail
Displays the preview in the Open dialog box.

Windows Thumbnail
Saves a preview that Windows systems can display.