Canon EOS 1D Software Instruction Manual page 170

Saving Images
The image is saved as a new image in the same folder as the selected image.
Allows you to specify the folder
in which the image will be saved.
Select a setting for [Quality] (compression ratio) when you have selected [JPEG] from
the list box, from [4 (Highest image quality)] through [1 (High compression ratio)].
Higher values give higher quality of the JPEG image.
If you click this checkbox, the JPEG images that were
taken in the RAW+JPEG format are also to be saved.
If some of the images to be saved are RAW images, select [Do not convert], [JPEG], or [TIFF] for the
conversion format. If you select [TIFF], you can select the number of bits used when you save images, from
[8bit/ch], [16bit/ch] and [16bit/ch linear]. If you select [JPEG], the images are saved in the [8bit/ch] format.
The extensions used for the saved files are shown below.
Conversion Format
Do not convert
JPEG (8bit/cn)
TIFF (8bit/cn)
TIFF (16bit/ch, 16bit/ch linear)
M-46
When the [Save in following specified folder] radio
button has been selected, this button allows you to
specify the folder in which the image will be saved.
The name of the destination folder is displayed
next to the [Browse] button.
Specify the resolution for saving images in a range of
10 to 2000 pixels/inch.
Extension
.CR2
.JPG
.TIF
.TIF