There are several ways of writing a hyperlink to open in a new window...or
in other words, create a popup window. Reference: The ECMAScript code
approach:
http://office.microsoft.com/en-us/publisher/HA011587451033.aspx

I have used both, but if you choose to use the ECMAScript code approach
there is an error in the first code snippet.

In step 2 instead of using this:

<script language="JavaScript" type="text/javascript"> <!-- function
Show(Url, Name, Features) { window.open(Url, Name, Features); } // -->
</script>

use this:

<script language="JavaScript" type="text/javascript">function Show(Url,
Name, Features) { window.open(Url, Name, Features); }</script>

Just copy and paste the code snippet in a code fragment box and move it to a
corner of your publication some where it won't be in the way. It will not be
visible when you view your web page.

Now to use this approach the next step is you will need to create a folder
on your host at the same level in the directory as the index.htm file and
the index_files folder to contain your large size images. I would suggest
calling it "images". You will need to optimze and size your images in a
third party image editing program, and then upload your large size images to
that folder.

Now you can write a hyperlink that will open the large images in a new
window. The article describes the different attributes that you can put in
the link, but here is one to start with:

javascript:Show('http://www.yourdomain.com/images/yourimage.jpg','newwindow','toolbar=no,scrollba
rs=yes,resizable=no,height=360,width=480')

Of course change out the domain name and the file name for your image, and
adjust the height and width to what ever size your large images are. Select
your thumnail image, right click, insert hyperlink and paste the code in the
address field. Ctrl + V is handy for this. Now if you uploaded your images
to the "images" folder on your host, you can do a web page preview, click
the thumbnail and a new window that is 360 X 480 will pop up with your large
image. The viewer can click the X to close. To customize the link, reference
back to the article where they discuss the different attributes.

DavidF