This feature is used to fill text within the area of a shape, using the shape as a border.
It's a feature called text in shape or text in object. The shape can be a simple one, a complex one, or ever a text character (like a number) that has been transformed into a shape. Hope this helps, I'm not the with explaining, but the feature is easily found on YouTube. Cheers, and thanks for the hard work, affinity engineers. You guys have our respect
