Canon EOS 80D - Manual (Page 216)

P Multiple ExposuresN
216
You can select a 1 image recorded on the card as the first single
exposure. The image data of the selected 1 image will remain intact.
You can only select 1 images. You cannot select 41/61 or
JPEG images.
1
Select [Select image for multi. expo.].
 The images on the card will be
displayed.
2
Select the first image.
 Turn the <5> dial to select the
image to be used as the first single
exposure, then press <0>.
 Select [OK].
 The file number of the selected image
will be displayed at the bottom of the
screen.
3
Take the picture.
 When you select the first image, the number of remaining
exposures as set with [No. of exposures] will decrease by 1.
For example, if [No. of exposures] is 3, you can shoot two
exposures.
Merging Multiple Exposures with an Image Recorded on the Card
 Images shot with [z3: Highlight tone priority] set to [Enable] and
images whose [z4: Aspect ratio] is set to any setting other than [3:2]
(p.146) cannot be selected as the first single exposure.
 [Disable] will be applied for [z1: Lens aberration correction] and
[z2: Auto Lighting Optimizer] regardless of the settings of the 1
image selected as the first single exposure.
 The ISO speed, Picture Style, high ISO speed noise reduction, color
space, etc. set for the first 1 image will also be applied for the
subsequent images.
 If [z3: Picture Style] is [Auto] for the RAW image selected as the first
1
image, [Standard] will be applied for shooting.
 You cannot select an image taken with another camera.
 You can also select a 1 multiple-exposure image as the first single exposure.
 If you select [Deselect img], the selected image will be canceled.