<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">'ve used intersurf to show the interface area between two different protein sub-units. I'm attaching an image.<br><br>Is it possible to increase the transparency of the interface area shown in red? I found no way to do so.<br><br>Many thanks in advance for any suggestions<br><br>Regards<br><br>George<br><br><b>PS. </b>No attachment as it is 33.5 Mb. By the way, is there a way to reduce the size of tiff images without compromising the quality?</body></html>