1. Why doesn't the Zotero toolbar display in Word 2016 on my Mac?
First try reinstalling the toolbar in the Cite section of Zotero settings. Be sure that your Word application is completely shut down before doing so. After installing, open Word and check to see if it is there. If it is not, it might be because your copy of Word 2016 is not up to date. In your Word Help menu, select "Check for Updates." You may need to do this more than once to ensure that all the updates are installed.
In Word 365, go to File > Account and under Product Information, choose Update Options > Update Now.
2. Is there a spell-checker in Zotero notes?
Zotero recognizes spelling errors in notes (only for English), but doesn't provide other spell-check functionality, like suggesting corrections. If you want to remove the red squiggles highlighting your spelling errors, open the Config Editor in the Advanced section of Zotero settings and change the value of extensions.spellcheck.inline.max-misspellings to 0.
3. Does Zotero work with Chromebooks?
To use the full version of Zotero, you must download and install it, which you cannot do on a Chromebook. There are instructions for installing Zotero on a Chromebook at Zotero.org, but it also requires the installation of Linux.
With a Chromebook you can use many features of Zotero through Zotero.org. You can also use ZoteroBib if you just want quick citation help. (See the ZoteroBib tab in this guide.)
Install a connector for the browser you use to do research. When you want to add an item to your Zotero library, a window will pop up. Choose the Enable Saving to Online Library option and accept the default permissions presented in the next screen.
1. Why is the capitalization incorrect in my bibliography?
When you import a reference, Zotero saves it exactly as it appears on the page you downloaded it from. Right-click on the title and choose Title Case or Sentence case. You are advised to choose Sentence case because this can be easily converted by Zotero to Title Case if the style you choose requires this. But it is not as easy for Zotero to convert Title Case to Sentence case because some words might need to remain capitalized (such as proper nouns).
2. Why doesn't the Zotero translator (Zotero icon in the browser) correctly import the reference?
There are some pages you will visit that won't have adequate metadata for Zotero to translate, in which case you will need to manually enter the data. However, if you are having this difficulty with a catalog or database, look for the option to select and/or save the item. Then choose the option to view the items (usually a folder or link near the top of the screen). If you are given the option to Export or Save, your options may include Export to Zotero. If not, choose either BibTeX or RIS.
In Zotero, choose File > Import and navigate to where the RIS or BibTeX file was saved. It will import the references into a new folder, where you can review them for accuracy. You can then drag them into a collection.
3. How does Zotero handle abbreviated titles? 
When you use a citation style that requires abbreviated journal titles, you have two options.
1) If you are using Zotero with a Word Processor, in the Document Preferences you can choose to "Use MEDLINE journal abbreviations." This option will only appear when you select a style that uses journal abbreviations. When you create a bibliography, Zotero will generate the abbreviations from the information that appears in the Publication field.
2) If you uncheck that option, then Zotero will generate the abbreviations from the information that appears in the Journal Abbr. field. Ideally the abbreviations should include periods, since Zotero can remove them when the citation style dictates that, but cannot add them.
Many databases that abbreviate journal titles in their records will automatically populate Zotero with the full journal title in the Publication field and the abbreviation in the Journal Abbr field. If the database does not do this, it is recommended that you edit the record yourself. A guide at the University of Denver Library provides a useful list of tools for identifying titles from abbreviations.
Your citations are underlined with a dashed line
When you insert citations into your document, Zotero may need to update other citations in the document and bibliography. When the citations in your document are underlined with a dashed line, it means you have the automatic citation updates disabled. (In large documents, citation updates can take a while, and Zotero likely prompted you to disable automatic updating to speed up your writing).
Your citations become unlinked in Word
If you've previously used one of Zotero's word processor plugins to insert citatins into a document and later find that 1) the plugin says "You must insert a citation before performing this operation", 2) the bibliography doesn't contain all citations in the document, and/or 3) references in a numeric citation syle start from 1 instead of from an appropriate higher number, then the existing citations in the document may no longer be active fields. This can happen if you
Your citations become unlinked when sharing a Google doc
Google Docs uses a different mechanism than Word to store citations and it can be easier for citations to accidentally become unlinked. The most common cause is collaborators editing the document without having the Zotero connector installed in the browser they use to edit the document. (They must have the connector installed, but do not have to install the Zotero app unless they are inserting and editing citations.)
To restore unlinked citations, look in Google Docs version history for an earlier version of the document. Or, use the Zotero plugin to reinsert the citations.
1. Why won't the PDF download along with the reference?
Verify that you have your settings set to Automatically attach associated PDFs and other files when saving items. You may see a red X in front of the attachment file name when Zotero attempts to download the attachment but fails. This is usually caused by the platform you are using requiring you to first complete a CAPTCHA before downloading. This is the case with JSTOR and ScienceDirect. If you complete the CAPTCHA, subsequent attachment downloads should work.