Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 162)

Image Quality
Image Size Selection
RAW Images
Guide to Image Quality Settings
Maximum Burst for Continuous Shooting
JPEG/HEIF Quality
Image Size Selection
You can specify , , , or for JPEG images, for HEIF images, and or
for RAW images. Image size can be set in either of the following ways.
Setting size via the rear LCD panel
1.
Press the < > button ( ).
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