Enable Chart Tool options by clicking anywhere within an Excel 2007 or 2010 chart whose information you want to modify. Click Design on the main menu, then Layout and finally, select Axis Title or ...

If you want to add labels to the bubbles in an Excel bubble chart, you have to do it after you create the chart. Mary Ann Richardson explains what you need to do to add a data label to each bubble.

Notice that in this case making the vertical axis horizontal caused the Excel default for the horizontal labels to slant which I find distracting. We are now left with the two positions on the top.

Excel 2010 gives you a decent number of ways to manipulate the intervals on a numerical axis, which is the y-axis on most charts, and a few minor ways to manipulate a category axis, which is the x ...