# Allow search engine indexing
If you want your published documentation to be indexed by search engines, enable the Allow search engine indexing checkbox when [creating a new instance](instances.html#add_help_instance). Otherwise, it will not be indexed by search engines and thus will not appear in search results.
Procedure: Enable indexing for existing instance
1. In the Writerside tool window , right-click an instance and select Edit. .
2. In the Edit Instance dialog, select Allow search engine indexing and click OK.
This option controls the `` variable in `[buildprofiles.xml](buildprofiles-xml.html)` . By default, if the variable is not present, content will not be indexed. You can manually enable indexing by adding the variable globally for all instances or for a specific one:
```XML
false
```
Procedure: Restrict indexing for topic
If you enable indexing globally or for certain published instances, you can still hide content of specific topics from search engines using the `` tag.
* Add a self-closing `` element at the beginning of a topic. You can filter this element to restrict indexing a topic only for specific instances.
Markdown:
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# Install Writerside
This is how you install Writerside.
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Semantic markup:
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