Summarize:

It's a blue app with a white "W" on it. To do so, first click the File tab, then click New Document. In Word 2016, you may instead click Blank Document on the right side of the page. On Mac, you'll first need to click New. It's in the top-left corner of the Word window. On Mac, click Word in the top-left corner of the menu bar. You'll find it near the bottom of the left-hand pane. On Mac, click Preferences near the bottom of the drop-down menu. This option is on the left side of the pop-up window. On Mac, you'll instead click View beneath the "Authoring and Proofing Tools" heading. It's in the "Main Tabs" pane on the right side of the window. On Mac, instead click the Show developer tab box that's beneath the "View" heading. If this box has a check mark in it, the Developer tab is already enabled. Doing so will save your changes and return you to your Word document.
Open Microsoft Word. Open a new document. Click File. Click Options. Click Customize Ribbon. Click the Developer check box. Click OK.