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.

Microsoft Excel 2010 can create a chart to illustrate numeric data from a worksheet. Excel's "Chart Tools" contain "Labels" that customize the chart area. Add an overlay for a chart title or a ...

In Microsoft Excel, to draw attention to a specific marker in a line chart, drop in a thin line, think of it as a marker.

Word lets you add simple lines, double lines, dotted lines, and jagged lines, for example. Here's everything you need to know to insert a line within a Word document.