How to Add WordArt in Excel 2013
After making any final adjustments to the size, shape, or orientation of the WordArt text with the sizing and rotation handles, click a cell somewhere outside of the text to deselect the graphic.
Note that Excel automatically compresses the text to fill the shape and size of its text box. To put more space between the words and the characters in each word, make the text box wider by dragging the sizing handle on either side of the text box.
When you click outside of the WordArt text, Excel deselects the graphic, and the Drawing Tools contextual tab disappears from the Ribbon. (If you ever want this tab to reappear, all you have to do is click somewhere on the WordArt text to select the graphic.)