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First, make sure you have selected the appropriate view option, Document Size, to display information on the amount of data in the image. The number on the left represents the printing size of the image–approximately the size of the saved, flattened file in Adobe Photoshop format. The number on the right indicates the file’s approximate size including layers and channels.
Where do I find the 404 MB figure in PS?
That is the size of the compressed image file on your disk, so you’ll find it right where you did, in the Finder. 🙂
One of the factors that affect file size is file format–due to varying compression methods used by GIF, JPEG, and PNG file formats, file sizes can vary considerably for the same pixel dimensions. Similarly, color bit-depth and the number of layers and channels in an image affect file size.
Go to Photoshop’s "Help" and do a search on Tracking File Sizes.
So layered Photoshop files are uncompressed and the Finder image files are compressed? You lost me.
Open files are uncompressed (whether one or more layers). The size of the uncompressed file represents the Memory space it needs. The closed file in the Finder is compressed to the degree specified by the file format you chose to save the file.
When you send a file to the printer, it gets flattened if it had more than one layer. If it’s already a one-layer file, it’s already flattened.
Seems to me the 404 MB figure is the only important number and I don’t understand why the others are helpful.
My sentiments exactly. I have no idea why you are worrying about the other figures. If you were in a position to make use of them, you would know.
Seems to me the 404 MB figure is the only important number and I don’t understand why the others are helpful
As someone who does a lot of scans for customers, I find the uncompressed image size to be very useful, our billing for scans depends on the uncompressed file size (ie a 20Mb scan will cost the same wether it is saved as a TIFF, a JPEG or a PSD, even though the file sizes (as opposed to image size) are different)
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