To ensure your text appears "solid" and consistent throughout your project plan, you should use the feature rather than formatting individual cells. This applies global changes to specific categories (like all Summary Tasks or all Critical Tasks).
Navigate to the tab (or Format tab depending on your view). Click Text Styles in the Format group. Microsoft Project 2019
If you need to store custom information that doesn't fit into standard columns (like "Department" or "Notes"), Microsoft Project 2019 provides 30 built-in (Text1 through Text30). To ensure your text appears "solid" and consistent