Instead of typing the DITA-OT parameters at the command prompt, you might want to create an Ant build script that contains all of the parameters.

1. Create an XML file that contains the following content:

   <?xml version="1.0" encoding="UTF-8" ?>
   <project name="@project-name@" default="@default-target@" basedir=".">
   
     <property name="dita.dir" location="@path-to-DITA-OT@"/>
    
     <target name="@target-name@">
       <ant antfile="${dita.dir}${file.separator}build.xml">
         <property name="args.input" value="@DITA-input@"/>
         <property name="transtype" value="html5"/>
       </ant>
     </target>
   
   </project>

   You will replace the placeholder content (indicated by the @ signs) with content applicable to your environment.
2. Specify project information:
   1. Set the value of the @name attribute to X.
   2. Set the value of the @default attribute to the name of a target in the build script.
      If the build script is invoked without specifying a target, this target will be run.
3. Set the value of the dita.dir property to the location of the DITA-OT.
   This can be a fully qualified path, or you can specify it relative to the location of the Ant build script that you are writing.
4. Create the Ant target:
   1. Set the value of the @name attribute.
   2. Specify the value for the args.input property.
   3. Specify the value of the transtype property.
5. Save the build script.

<?xml version="1.0" encoding="UTF-8" ?>
<project name="Toolkit-documentation" default="all" basedir=".">
    
    <property name="dita.dir" location="C:\DITA-OT1.6.M5"/>
    
    <target name="all" description="build CHM and PDF" depends="chm,pdf"/>
    
    <target name="chm" description="build CHM">
        <ant antfile="${dita.dir}\build.xml">
            <property name="args.input" value="C:\dita-ot\src\main\doc\userguide.ditamap"/>
            <property name="args.gen.task.lbl" value="YES"/>   
            <property name="output.dir" value="C:\kje\temp\out"/>
            <property name="transtype" value="htmlhelp"/>
        </ant>
    </target>
    
    <target name="pdf" description="build PDF">
        <ant antfile="${dita.dir}\build.xml">
            <property name="args.input" value="C:\dita-ot\src\main\doc\userguide.ditamap"/>
            <property name="args.gen.task.lbl" value="YES"/>   
            <property name="args.rellinks" value="nofamily"/>   
            <property name="output.dir" value="C:\kje\temp\out"/>
            <property name="transtype" value="pdf"/>
        </ant>
    </target>
    
</project>