<ol>
<li>Double-click on the symbol that you would like to change (SHA).</li>
<li>The following window displays.</li>
[[Image:Existing_symbol2.png|500px|center]]
<div align="center">
'' Marker properties''
</div></li>
<li>You can change a form, colour, size, angle, mask etc. For Advanced editing, click on the symbol.</li>
<li>The following window displays.</li>
[[Image:Existing_symbol3.png|500px|center]]
<div align="center">
'' Symbol editor - Background''
</div>
<li> If you would like to change the background colour then select the background layer and a colour.</li>
{{Note | The size is different in the foreground and background layers of the symbol.}}
<li>Click on OK to close the Symbol editor.</li>