Save large documents
Photoshop supports documents up to 300,000
pixels in either dimension and offers three file formats for saving
documents with images having more than 30,000 pixels in either dimension.
Keep in mind that most other applications, including versions of
Photoshop earlier than Photoshop CS, cannot handle files larger
than 2 GB or images exceeding 30,000 pixels in either dimension.
Choose File > Save As, and choose
one of the following file formats: - Large Document Format
(PSB)
- Supports documents of any file size. All Photoshop
features are preserved in PSB files. Currently, PSB files are supported
only by Photoshop CS and later.
- 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.
- TIFF
- Supports files up to 4 GB in size. Documents larger than
4 GB cannot be saved in TIFF format.
PDF (adobe.com)
