Canon EOS RP Instruction Manual page 529

All Images in a Folder
Select [Mark all in folder] and select the folder. A print order for one
copy of all the images in the folder will be specified.
If you select [Clear all in folder] and select the folder, the print order
for all the images in the folder will be canceled.
All Images on a Card
If you select [Mark all on card], one copy of all the images on the
card will be specified for printing.
If you select [Clear all on card], the print order will be cleared for all
the images on the card.
If the search conditions are set with [ 3 : Set image search conditions]
( = 345) and you select [Multiple], the display will change to [Mark all
found images] and [Clear all found images].
All Found Images
If you select [Mark all found images], one copy of all the images
filtered by the search conditions will be specified for printing.
If you select [Clear all found images], all the print order of the filtered
images will be cleared.
RAW images or movies cannot be specified for printing. Note that RAW
o
images or movies will not be specified for printing even if you specify all
images with [Multiple].
When using a PictBridge-compatible printer, do not specify more than 400
o
images for one print order. If you specify more than this, the images may not
all be printed.
Digital Print Order Format (DPOF)
321