After installing the Zotero Connector to your browser, a Zotero icon (that looks like a sheet of notebook paper) will appear in your toolbar. 

To add a page to your library, click on the icon.

A small box will appear below the icon in your toolbar, showing Zotero's progress saving your entry to your library. 

You can select the carrot icon on the right-hand side to specify which folder to add the resource to

Drag and drop a downloaded file from your computer's desktop, downloads file, or documents. Make sure to retrieve available metadata. 

This option is appropriate if you are importing a large number of resources from a different citation library or completing a batch resource download.

While in Zotero, select File --> Import. Follow the Import Wizard prompts. 

If you have an item's DOI or ISBN number you can use the "magic wand" button to Add items by identifier. Zotero uses the unique identifier to retrieve all associated metadata and add items to your library. 

1. Use the "New Item" button (paper with +) or File > New Item to select the item type you wish to add.

2. In the Item Pane on the right hand side of the window, manually type information about your item. Add as much as you can, including title, author/s, date of publication, page numbers, DOI, etc. 

3. To add a PDF or relevant URL to your resource, right click the entry and select "Add Attachment." You can also "drag and drop" a file onto the relevant item. You can also use the Find Available PDF function. If an article is Open Access, Zotero can use Unpaywall to find a PDF. 

Tip:

To re-format titles, click on [...] next to the Title or Publication field in the right hand pane to change the capitalization to Title Case or Sentence Case.