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.

How to Highlight Intervals in Graphs in Excel. The interval between the gridlines in an Excel chart is typically blank, but you can highlight the intervals using an alternating pattern by changing ...

How do I insert a horizontal line in Docs? If you use Google Docs instead of Microsoft Word, you can insert a horizontal line easily in that application as well.

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.

Do you want to add Grids and Rule lines to your notes in OneNote? This tutorial will show you how to create a Grid Line and Rule Line.

A line chart connects a series of data points and is used by traders to monitor prices, currencies, indexes, and other data.