Step 1th, open the Word2010 document window, and click the file → options button, as shown in Figure 1.
Figure 1 Click the Options button
2nd step, in the Open Word Options dialog box, switch to the Custom Ribbon tab, select the Development Tools check box in the Main tab list in the Custom Ribbon area, and click OK, as shown in Figure 2 below.
Figure 2 Selecting the Development Tools check box
Step 3rd, return to the Word2010 document window and see the Development Tools tab in the Ribbon, as shown in Figure 3.
Figure 3 The Development Tools tab