rearraging photos in ALL PHOTOS, Gallery and Slideshow

I cannot seem to find a way to control the order of the photo display in skydrive's All Photos or its "slide show".  I have read the instructions re. how to order and arrange the photos within the folders within  Skydrive FILES in which they are stored; however the order of the files within the folders in FILES seems to have absolutely NO bearing upon the order in which the photos come up on display int he slide show and within the gallery in ALL PHOTOS.  Is this question articulated clearly  enough to render a pertinent and specific answer?  Please let me know if it is not sufficiently clear.  Any help would be appreciated.