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If you want to manually edit the SLD for the selected Layer then click on the Advanced tab. 

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Here you can manually configure the style of your OGC Layer. Astun supply some default SLD files in the folder specified in the iShare Settings General tab SldSnippetDefinitionPath. For more information on SLD please refer to the GeoServer documentation which has plenty of examples httphttps://docs.geoserver.org/stable/en/user/styling/sld-/cookbook/index.html.

Toolbar

There is a Toolbar at the top of the Editing pane for common functions:

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• Undo - the last action
• Redo - the last action
• Cut - the selected data
• Copy - the selected data to the clipboard
• Paste - from the clipboard into the cursor position
• Currently available snippets - allows you to insert a selected snippet at the current cursor position.
• Format the SLD - clicking this button will format the SLD for you.

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<Rule>
	<Name>Ward</Name>
	<PolygonSymbolizer>
		<Fill>
			<CssParameter name="fill">#008000</CssParameter>
			<CssParameter name="fill-opacity">0.25</CssParameter>
		</Fill>
		<Stroke>
			<CssParameter name="stroke">#004000</CssParameter>
			<CssParameter name="stroke-width">2</CssParameter>
			<CssParameter name="stroke-opacity">1</CssParameter>
		</Stroke>
	</PolygonSymbolizer>
	<TextSymbolizer>
		<Label>
			<ogc:PropertyName>name</ogc:PropertyName>
		</Label>
		<Font>
			<CssParameter name="font-family">arlrdbd</CssParameter>
			<CssParameter name="font-size">11</CssParameter>
		</Font>
		<LabelPlacement>
			<PointPlacement>
				<AnchorPoint>
					<AnchorPointX>0.5</AnchorPointX>
					<AnchorPointY>0.5</AnchorPointY>
				</AnchorPoint>
				<Displacement>
					<DisplacementX>0</DisplacementX>
					<DisplacementY>0</DisplacementY>
				</Displacement>
			</PointPlacement>
		</LabelPlacement>
		<Fill>
			<CssParameter name="fill">#004000</CssParameter>
		</Fill>
		<Halo>
			<Radius>0</Radius>
			<Fill>
				<CssParameter name="fill"></CssParameter>
			</Fill>
		</Halo>
	</TextSymbolizer>
</Rule>

Best Practice

• Use a WHERE clause in the SQL statement for your Layer to limit the features being displayed rather than using FILTER statements in the SLD styling. Only use FILTER statements to style the display of the visible features.

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Using Multiple Rules

If you wish to apply different styles to a Layer then you can do this using Multiple Rules.

<Rule>
  <Name>Vehicle crime</Name>
  <Description>
    <Title>Vehicle crime</Title>
  </Description>
  <Filter>
    <PropertyIsEqualTo>
      <PropertyName>crime_type</PropertyName>
      <Literal>Vehicle crime</Literal>
    </PropertyIsEqualTo>
  </Filter>
  <PointSymbolizer>
    <Graphic>
      <Mark>
        <WellKnownName>circle</WellKnownName>
        <Fill>
          <SvgParameter name="fill">#000080</SvgParameter>
        </Fill>
        <Stroke>
          <SvgParameter name="stroke">#000000</SvgParameter>
        </Stroke>
      </Mark>
      <Size>7</Size>
    </Graphic>
  </PointSymbolizer>
</Rule>
<Rule>
  <Name>Other crime</Name>
  <Description>
    <Title>Other crime</Title>
  </Description>
  <ElseFilter />
  <PointSymbolizer>
    <Graphic>
      <Mark>
        <WellKnownName>circle</WellKnownName>
        <Fill>
          <SvgParameter name="fill">#FF8000</SvgParameter>
        </Fill>
        <Stroke>
          <SvgParameter name="stroke">#000000</SvgParameter>
        </Stroke>
      </Mark>
      <Size>7</Size>
    </Graphic>
  </PointSymbolizer>
</Rule>

For a list of available filter functions that can be used with in a Rule/Filter see: https://mapserver.org/ogc/filter_encoding.html

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