Step 1th, open the Word2010 document window and click the formula to make it editable.
Step 2nd, click the Drop-down triangle button to the right of the formula, and select the Professional or linear command to toggle between the two formula layouts, as shown in Figure 1.
Figure 1 Selecting the "Professional" or "linear" command
Tip: Users can also toggle the formula layout by clicking the Professional or Linear button in the tools group of the formula Tools/design ribbon, as shown in Figure 2.
Figure 2 Click the "Professional" or "linear" button