Excel's functionality includes chart options you can insert to add a title directly onto a line graph, so that you don't have to insert extra text boxes or type into the cells around the graph.

How to Make and Add Labels on a Graph in Excel. For even the most new-to-the-program users, compiling a graph in Microsoft Excel is fairly intuitive. Excel offers a one-click option on its "Insert ...

This post shows how to add Alt Text to Images, Charts, Objects & PivotTables in Excel. Alt Text provides useful information to persons with disabilities.