Add Book Reference to Zotero - Book Icon
Add Article Reference to Zotero - Article Icon
Select Multiple References on a Single Page - Folder Icon
Add Video Reference to Zotero - Video Icon
Add Web Page Reference to Zotero - Web Page Icon
Drag a PDF file into the Zotero middle column. You can have Zotero try to retrieve citation data for the item by right-clicking on the PDF file and choosing Retrieve Metadata for PDF. To automatically rename the PDF, click Rename File from Parent Metadata.
If you have an EndNote, RefWorks, or other citation manager account, and wish to add those reference into Zotero, click Import from the File menu.