Zooming into pictures

This has to be done in JavaScript to get the zoom factor right. So your button could execute this code.

this.zoom = 200;


But getting it right is much more difficult because you need to zoom to a specific location on the page. One easy way to do this, but its not always exact, is to set the focus to a specific element so that that element is centered on the screen. So, place an invisible button over the image and modify the code to this.

this.zoom = 600;
this.getField("image1").setFocus();

Or, if the zoom button is the button that's over the image.

this.zoom = 600;
event.target.setFocus();



And to zoom out do this modification.


if(this.zoom == 600)
this.zoom = 100;
else
{
this.zoom = 600;
event.target.setFocus();
}

Another approach is to zoom into the image as you want and then create a named destination. In the button, use the gotoNamedDest method: http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/JS_API_AcroJS.88.496.html

The MouseUp script would like:

gotoNamedDest("your_dest");

where "your_dest" is the name you gave the named destination.

That's a good one George!!
Then use app.goBack() to restore the previous view.

also, you can do the same without JS, simply by pointing the button's action to a named destination. here is a link to an exemplar https://acrobat.com/#d=Xf1xK-FTgOxiBdiyzI2P0Q
where the named destination is set to zoom the graphic at 250%

Thanks very much for the ideas guys its very much appreciated.