Merging fields allows you to format your elements so that they appear on one line. This can help to make your form look less overwhelming and more visually appealing. You can merge up to three fields at a time by holding the Shift key while selecting the fields that you'd like to merge and then by right clicking on one of the three and choosing Merge Fields from the drop-down menu. 

NOTE: This only work with Single-Line Text Fields, Multi-Line Text Fields and Drop-Down Select Fields. This will also not work with Conditional Show/Hide fields.