Transparent PNG

This transformation lets you create a PNG file that is partially transparent. Normally, Picture Window Pro does not handle semitransparent image files, but sometimes they required for web site design when you need to place an object over the page background and have some of the background show through. By associating a transparency mask with the input image, you tell Picture Window Pro how transparent to make different parts of the image.

The output image is the input image displayed against a checkerboard background to preview the effects of the transparency mask.

                       input                                        transparency mask                                      output

Transparency Mask

Use this control to create or select the transparency mask. Where the mask is black, the resulting image will be fully transparent. Where the mask is white the resulting image will be fully visible. Intermediate gray levels correspond to partial transparency.

Save As...

To save the image as a PNG file, click the Save As... button and select the location where you want to save the PNG file. Note that Picture Window Pro cannot read transparent PNG files, so if you want to edit the file you need to save the original image and the mask and rebuild the transparent PNG each time. This is easily done with a workspace script. Also, you cannot save binary images with transparency.