regarding electronic journal articles in particular, if you try to save directly to zotero from an omni page, you will usually only get the citation information, and not the full text .pdf.
as stated on our zotero guide, we recommend that you first click directly into the database which actually contains the full-text of the article, before you save to zotero. as an example, on the omni page shown below, first click into either the crkn access, or the scholars portal access, before trying to save to zotero.
zotero and omni
adding your results from omni to zotero
1. folder method
click on the folder icon that appears at the top of your results
select one, several or all articles to add to your folder
2. book icon method
right-click on the book icon at the top of your results
click on save to zotero and then save to zotero (primo 2018)
adding more than 10 citations into zotero from omni
if you'd like to add more than 10 citations at a time to zotero from omni, you will need to do the following:
click on the "go to next page" icon, which appears on the bottom, right-hand side of the page.
keep clicking on the next page icon until you have all of the citations you wish to import into zotero.
click on the zotero folder icon, which appears on the top right-hand side of the page.
click on "select all" and add all of your citations into zotero.