I have a lot of photos shot by DSLR (6000*4000). When I doubleclick a photo, first comes a small thumbnail which displays few things to see, then comes a spinning circle indicating "you are waiting for your own net disk" and covering the thumb, then, a few seconds passing by (less than 10s, long enough, or too long for pic viewing......), a definitely clear image jumps out.
There must be something between this two status: a medium image which is not too small and takes a short time to load, avoiding interrupting user's viewing experience. When it's completed, the next stage will be a "clear-enough image for user's screen" one. The original-sized image can be set to manually loaded by tapping a button by user or automatically loaded (I prefer the former one, leaving time for the next pic). Additionally, no circle above the image......lol
This one is easy to explain, just keep loading the next image when user is viewing the former one. Associated with #4, user's pic viewing experience will be greatly improved. The ideal one is "select any pic at will and view it instantly" and "keep tapping 'next' rapidly to skim as much as pics and get more information through the process"
Customer support service by UserEcho