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EC: Symbol__Renderer type__ ClassBreak
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Summarize:

Draw features using color to show values.

Take polygon layer for instance:

1. Open ClassBreak

  (1) Select the polygon layer and right-click the mouse, then click [Symbol] to open the [Polygon symbol]

        dialog.



  (2) Renderer type: ClassBreak



2. Usage  

  (1) Select a field according to Attribute table.



  (2) Fill → Fill color

      Method 1: Color mode ( see EC: Contour Layer__Symbol__Color mode )

      Method 2: Click a color box



  (3) Fill → Precision: Compute to N decimal places.

  (4) Fill → Input line value manual: Values must be set off by commas. When inputting is complete, press enter.



  (5) Fill → Min and Max: Minimum field value and Maximum field value.

  (6) Fill → By Count: Number of values



  (7) Fill → By Interval: The space between the value and adjacent value.



  (8) Stoke (See M: Line layer)