I'm not very computer savvy. In Icloud photos I see all photos but do not have a scroll button to access top to bottom making it impossible to select photos to download.
On my PC using Windows7 I've accessed Icloud Photos. I am unable to navigate the photo library because there is no scroll. There is the option to select photos for download however I am unable to do so with no scroll.
iPad 2, iOS 8.4, using HP PC Windows 7