When you look at charts on a PowerPoint slide from afar, you make out the value of a series by exploring where exactly it’s placed vis-à-vis the axis. Of course, if your chart has data labels that identify values, then this is less of an issue. So what is the solution to this problem? Tick Marks placed on the axes will help us get a better idea.
Learn about the Tick Marks, both Major and Minor on chart axes in PowerPoint 2013 for Windows.

