Problem
You'd like to embellish your charts with annotations (for example, to add emphasis or provide notes for viewers of your charts).
Solution
Use Excel's drawing tools to draw directly on your charts.
Discussion
The callouts (text boxes with arrows) on the chart shown in Figure 416 in Recipe 4.8 were added using Excel's drawing tools. You need to display the Drawing toolbar if it isn't already visible. Select View Toolbars images/U2192.jpg border=0> Drawing from the main menu bar. Figure 416 shows the Drawing toolbar docked in the lower left of Excels window.
The drawing toolbar contains all sorts of tools, allowing you to add text notes, callouts, arrows, shapes, and many other elements to your charts. There are also tools that allow you to format your annotations. For example, you can edit line style and thickness, color, and fill pattern, among other attributes. The 3D style buttons even allow you to create 3D effects to really make your annotations stand out. There are also tools that allow you to change the depth order, spacing, and alignment of your annotations.
To draw on your chart, simply select your chart and then click on the desired element from the drawing toolbar. Now start drawing on your chart. For example, to add a line to your chart, click the chart, then click the line button on the drawing toolbar, then click and drag on your chart to add the line. You can change the position of the line after it has been drawn by clicking and dragging it. You can also edit the line endpoints by clicking and dragging the endpoint handles (little circles).

Figure 429 shows an example chart that I embellished using Excel's drawing tools.
This chart illustrates results of a standard beam analysis. The results include load, shear, and bending moment curves, as well as calculated reactions at each support. To create this chart, I prepared a table of data including the load, shear, and bending moment values at various locations along the beam. I plotted this data on a standard XY scatter chart using the procedure outlined in Recipe 4.1. I formatted the primary and secondary axes to display specific ranges with minimum and maximum units, as described in Recipe 4.4. For the primary yaxis, I specified the crossing point for the xaxis as 800. I did this to force the xaxis toward the bottom of the chart.
After setting up the curves and axes, I labeled the bending moment and shear curves using Callout text boxes with leader arrows, which are accessible from the Drawing toolbar's Autoshapes Callouts menu. To represent the beam, I added a basic rectangle shape and manually positioned it where the
Rightclick on any drawing element you add to a chart or spreadsheet and select Format Autoshape from the menu to format the shape (or press Ctrl1). You can also using the formatting tools displayed on the Drawing toolbar. 
Figure 429. Annotated chart
I used small triangle shapes to represent standard, simple supports for the beam. I added these by accessing the Autoshapes Basic Shapes menu from the Drawing toolbar. I manually positioned them at the proper images/U2192.jpg border=0> Block Arrows menu on the Drawing toolbar. I formatted these with a red fill color. Further, I added a couple of text boxes (also accessible from the Drawing toolbar) to indicate the calculated reaction forces. I formatted the beam, support, and reaction shapes with a faint drop shadow for a little depth effect. I used the Shadow Style tool (the button with a rectangle and drop shadow, second from the right) from the Drawing toolbar to format the drop shadow.
These are just a few examples of the sort of embellishments you can add to your technical charts to make them more meaningful, readable, and attractive. Excel's drawing tools are far more extensive than has been demonstrated here. You can add 3D text and shapes, draw smooth lines and edit their points, and prepare flow charts, among many other drawing tasks. I encourage you to explore the drawing tools more.
See Also
Do a search in Excel's help using the keywords "drawing" or "autoshapes" to find help topics specifically related to drawing in Excel.
Using Excel
Getting Acquainted with Visual Basic for Applications
Collecting and Cleaning Up Data
Charting
Statistical Analysis
Time Series Analysis
Mathematical Functions
Curve Fitting and Regression
Solving Equations
Numerical Integration and Differentiation
Solving Ordinary Differential Equations
Solving Partial Differential Equations
Performing Optimization Analyses in Excel
Introduction to Financial Calculations
Index