1. We can manipulate the image in different ways:

   <isl debug="true" offscreen="false">
        <bundle file="${islpath}/isl.xidv"/>
        <pause/>
   
        <!-- Make an image -->
        <image file="${islpath}/clipped.png">
             <!-- Clip it at the lat/lon box -->
             <clip north="60" south="20" east="-60" west="-140"/>
   
             <!-- resize it -->
             <resize width="400"/>
   
             <!-- Make a thumbnail -->
             <thumbnail file="${islpath}/clipped_thumb.png" width="25%"/>
        </image>
   
        <!-- Make another image -->
        <image file="${islpath}/matted.png">
             <!-- add a logo overlay -->
             <overlay image="https://resources.unidata.ucar.edu/idv/logo.gif"
                      place="LL,10,-10"
                      anchor="LL"/>
   
             <!-- Matte the image -->
             <matte background="red" bottom="100" top="100"/>
   
             <!-- Overlay some text -->
             <overlay text="Workshop Example" place="LM,0,-10" anchor="LM" color="blue" fontsize="24"/>
   
        </image>
   </isl>
   

   image5.isl
2. Note: everything we can do with the image tag we can also do with the movie tag:

   <isl debug="true" offscreen="false">
        <bundle file="${islpath}/isl.xidv"/>
        <pause/>
   
        <movie file="${islpath}/overlay.mov">
             <!-- add a logo overlay in the upper left -->
             <overlay image="https://resources.unidata.ucar.edu/idv/logo.gif"
                      place="ul,10,10"
                      anchor="ul"/>
        </movie>
   </isl>
   

   image6.isl

Unidata IDV Workshop for version 6.2u2 > Advanced Topics > Scripting with IDV