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Now let's look at some of the options that are available for us to format our chart to apply all of those common features that nearly all charts have, things such as a Chart Title, a Legend, clearly numbered and labeled Axes that include units. So let's go ahead and start off by clicking one time on our chart to select it. And then since we're done with the Chart Data Editor for now, we'll go ahead and close that window. If we need to open it again, we can open it again right from our Chart Inspector by clicking the Edit Data button. Next, let's go ahead and check the box for Show Title on the Chart tab.
As soon as we do, a chart title appears. We can edit the title by simply double-clicking on the title to select it and begin editing it. We want to type in a very descriptive title that lets the users know everything that they need to know about what this particular chart is. So this chart is 100 and 10 year Average Monthly Snowfall Chart. We can then deselect it by clicking away. We can click one time on our chart to make sure our chart is selected so that our Chart Editor is contextually aware of what we're going to be selecting.
The next thing we want to do is go ahead and click on the Axis tab, and now we can set up some settings for the Data Axis. We'll start with Y axis over here on the left-hand side. Click the dropdown menu for Choose Axis Options and select Show Title. Now, a title automatically appears for us. We can double-click on Value Title and then triple-click in order to select all of the text. Let's go ahead and type in something that's very descriptive for this, such as Average Snowfall in Inches.
As soon as we finished typing the text, we can click away to deselect it, and that new text label is applied to the side of our axis. With our chart selected, we'll come back over to the dropdown menu for Y axis values, and this time we'll go ahead and select Show Chart Borders. This way a border is added on the Y axis on both sides of our chart. This adds a nice little offset for our chart and cleans things up a little bit. The next thing we want to adjust is the number of steps that our chart has.
Currently it's set to 4, meaning that iBooks Author has automatically calculated what the highest value is on our chart and set up a maximum and minimum value for what our chart data should be displaying and how many steps should be marked in between. Four steps is okay, but with four steps, we do not get even numbers, and it makes our chart a little harder to discern. So we'll simply click on the up arrow for Steps to increase the number of steps to 5. Now, with a range of 0 to 50 in five steps, each of our individual lines represents an increase of 10 inches.
The other options that we have available to us here on the Y axis controls is that we could choose to format the numbers to some other type of number. So instead of being just a regular number, we could set these to be currency, or we could set them to be a percentage, but none of those values make any sense. So we'll go ahead and leave it set to Number, and then we'll make sure that the decimal places is set down to zero, so we don't see any decimal places. It makes for a nice clean chart. Now, let's go ahead and turn our attention down to the X axis.
Down here at the bottom of our Chart Inspector on the Axis tab, we can click the dropdown menu, and once more select Show Title. A label appears for us for the X axis that we can double-click on and then triple-click in order to select all of the text inside of there. For the label for this, all we need to type in is Months. We can deselect it by clicking anywhere else on our page, and now our axes are properly labeled. Let's go ahead and look at what kind of treatments we could apply to the lines themselves. Go ahead and click one time on the chart to select it and then click on one of the lines.
Next, we can come over here to series in our Chart Inspector. Now, we can choose different Data Symbols that appear on those lines. So for instance, by default we have a circle or we could choose an upward-pointing triangle, a downward- pointing triangle, or any of these other different options. I like the basic circles that are already there, and they have a nice clean look to them, so I'll go ahead and reselect that. Next, we can choose how the lines that connect each point are drawn. By default, for this chart type they show up Straight.
If we click the dropdown menu, we can change that to Curve. Now, our data appears as if it's smoothed out so it looks like the data flows more smoothly. This may not actually represent reality, so in this case we're going to go ahead and leave our connection points set to straight since we just have these average open data points. If we wanted to add Error bars onto our chart, we could come down here to the Advanced section, we could select Error bars, and then we can choose the type of Error bars we want, and then we could choose the type of value--whether it's a Fixed Value, a Percentage, a Standard Deviation, or Standard Error--applied to each line.
I'm going to go ahead and leave the Error bars off on this graph since it's a Travel Guide, and we probably don't need that detail of data. So we'll go ahead and change this option back to None, and our graph cleans up quite a bit. Our chart is looking pretty good. In the next movie, we'll look at what happens if we decide to change the type of chart that we're using.
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