Steven Shiau - 2015-12-13

Option "-C" is for Partclone only. Therefore you can not find it in Clonezilla expert mode. However, if you turn on "-icds" and "-k1" of Clonezilla, it will use the option "-C" for partclone when running partclone.
BTW, to restore an image for that saved in a larger disk to smaller disk might not work. You have to make sure all the used blocks are within the boundary, and the partition table layout can not be too complicated so that Clonezilla is able to deal with that.

Steven.