The web uploader has just been updated, and you can now duplicate observations and drag to reorder observations.
To duplicate an observation (or observations), select it (or them) then click “Duplicate” at the top. Everything about the original observation will be duplicated except the species guess, observations fields, and projects.
To reorder a observation, drag and drop it either between two other observations or to the edge of another observation. You will see a dotted line appear, showing you where the observation will now be placed.
I often upload one observation at a time, 2-5 photos and hit select all then combine…, then either submit while I use filemanager to preview the next obs photos (and decide which ones I’ll use), or drag and drop the next lot and select the range not including the first observation. After a session at the arboretum I know they will largely be 3-5 photos per observation, but if uploading a large batch of just one or a few photos per observation, THEN I will drag and drop the lot and drag individual tiles to combine…
I agree it would be better if the duplicate and combine swap places, but only if it is easy to do… it still works and we’ll get used to it!
[edit: I do it this way largely because my computer crashes often… and it is very frustrating to spend 2 hours combining tiles, entering IDs and comments, tweaking pin locations, etc just to have the computer crash and have to start all over again…]
Are you asking if you can reorder observations on your computer itself, or on the iNaturalist website? This functionality only works once you’ve added photos and sounds to the iNaturalist web uploader (which works best on a desktop or laptop computer). It won’t affect anything that is on your hard drive.