How does word hollow out fonts?

In Word, if you want to change the font into a hollow form, you can use the method of artistic words to achieve it. The specific steps are: first enter the corresponding characters in the document, then select them, click Insert-Text-WordArt in the menu bar, and click a hollow font in the WordArt type, so that the characters will become hollow, and the outline and color of the font can be set independently, as shown in the following figure.