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Introductie van Micorosoft SQL Server 2016

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129 C H A P T E R 7 | Better reporting Figure 7-5: Configuring the Chart Data pane for a tree map. To improve the legibility of a tree map, you should consider making the following changes to specific chart properties: Size You should increase the size of the chart because the default size, 3 inches wide by 2 inches high, is too small to view the data labels that are enabled by default. Click the chart object, but take care to click an element such as the Chart Title or a series in the chart, and then adjust the Size properties, Width and Height, in the Properties pane. Legend To maximize the space of the chart area allocated to the tree map, consider moving the legend above or below the chart. To do this, right-click the legend, select Legend Properties, and then select one of the Legend Position options to reposition the legend. Data labels Even after resizing the chart, you might find that the default 10 point font size used for the labels is too large to display labels in each rectangle or that the black font is difficult to read when the series color is dark. To reduce the size of the font and change its color to improve the visibility of the data labels, click the chart to display the Chart Data pane, click the field in the Values area, and then locate the Labels section in the Properties pane. When you expand this section, you can change font properties such as size and color as needed. Note The size of rectangles in a tree map might continue to affect the visibility of the data labels even if you reduce the font size to 6 points. If the smaller label text cannot fit within the width of its rectangle, the label is not displayed. Tooltip One way to compensate for missing data labels in small rectangles, or to add more context to a tree map, is to add a tooltip, as shown in Figure 7-6. To do this, right-click a rectangle in the chart, select Series Properties, click the expression button next to the Tooltip box in the Series Properties dialog box, and type an expression such as this: =Fields!BusinessType.Value + " : " + Format(Sum(Fields!SalesAmount.Value), "C0")

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