#### 3.1.5. "Save file" screen

This screen is used to specify a save file for the w2x options file created or edited using the setup assistant. The recommended extensions for w2x options files are "`.txt`"[3] or "`.w2x`".

| About the files created by the setup assistant
Note that when needed to, the setup assistant also creates a custom XSLT stylesheet which is referenced by the w2x options file. For example, in the case depicted in the above screenshot, the setup assistant creates both `topic.w2x` and `topic_scripts/custom_transform.xslt`. Excerpts from `topic.w2x`:
    # AUTOMATICALLY CREATED BY w2x-app SETUP ASSISTANT. PLEASE DO NOT EDIT BY HAND!
    ###outputFormat topic
    ###option transform.topic-type concept
    ...
    -o topic
    -p transform.topic-type concept
    ...
    -t topic_scripts/custom_transform.xslt
Excerpts from `topic_scripts/custom_transform.xslt`:
    <xsl:stylesheet version="1.0"
      xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
      xmlns:h="http://www.w3.org/1999/xhtml"
      exclude-result-prefixes="h">

    <xsl:import href="w2x:xslt/topic.xslt"/>

    <xsl:template match="h:span[@class='c-FilePath']">
      <filepath>
        <xsl:call-template name="processCommonAttributes"/>
        <xsl:apply-templates/>
      </filepath>
    </xsl:template>
    ...

[3] Remember that w2x options filesare plain text, UTF-8 encoded, files.