Saving large documents (Photoshop)

Photoshop supports documents up to 300,000 pixels in either dimension and offers three file formats for saving documents with images greater than 30,000 pixels in either dimension. Keep in mind that most other applications, including older versions of Photoshop, can only support files up to 2 GB in size or images up to 30,000 pixels in either dimension.

To save a document with a file size larger than 2 GB:

Choose File > Save As and choose one of the following file formats:

Large Document Format (PSB)

Supports documents of any pixel size and any file size. All Photoshop features are preserved in PSB files. Currently, PSB files are only supported by Photoshop CS. In Preferences under File Handling, the Enable Large Document Format option must be selected before you can save files in PSB format. For more information about the PSB format, see Large Document Format (PSB).

Photoshop Raw

Supports documents of any pixel dimension or file size, but does not support layers. Large documents saved in the Photoshop Raw format are flattened. For more information about the Photoshop Raw format, see Photoshop Raw (Photoshop).

TIFF

Supports files up to 4 GB in size. Documents larger than 4 GB cannot be saved in TIFF format. For more information about the TIFF format, see TIFF.

To enable the Large Document Format in Photoshop:

1. Do one of the following:
• (Windows) Choose Edit > Preferences > File Handling.
• (Mac OS) Choose Photoshop > Preferences > File Handling.
2. Select the Enable Large Document Format (.psb) option.

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