ok. great.
if it turns out you still need to add observations to the “traditional” project, this is probably the fastest way to accomplish this for many observations at once:
#1
go to the edit observations screen. (in the website, look for your profile icon in the top-right corner of the page, hover over it, and select “Edit Observations” from the dropdown menu.
#2
on the Edit Observations screen, open up the search menu, and use the filter options to narrow down the observations you’re interested in. (for example, in the screenshot below, i’ve filtered for taxon=flies.)
#3
once you’ve narrowed down the observations you’re interested in, click on the Batch Edit button.
#4
at this point, you’ll see checkboxes to the left to the observations. select the observations you want to add to a project (or you can use the Select All option at the top of the page). when you have everything selected, select Add to Project, and pick your desired project. (note that although the list may include “collection” and “umbrella” projects, too, you can manually add observations only to “traditional” projects.)
…
note that you can use the same process to remove observations from projects. (click Remove instead of Add in the last step.) you can also adjust the process slightly to batch edit your observations in other ways. (in the last step, select Edit Selected instead of Add to Project.)
EDIT:
oh… i didn’t realize it until now, but there’s already a tutorial that covers most of what i wrote in this post, plus a few more tips: https://forum.inaturalist.org/t/adding-observations-to-a-traditional-project-wiki/13190.