Transparency
You can select one color in your picture to become transparent when that picture overlays another picture. The color you select for transparency becomes invisible, allowing you to see through those pixels to the lower picture.
To set transparency attributes:
1. Click TRANSPAR in the PICTURE menu.
2. Select a transparency option:
On — Prompts you to select a picture. If that picture has a transparency color, the color will become invisible during overlay.
Off — Prompts you to select a picture. If that picture has a transparency color, the color will not become invisible (default setting).
Color — To select a picture and apply the transparency color you have chosen from the color menu to it.
Note:
 
Transparent pixmap attributes must be set by Creo Elements/Direct Drafting. Attributes from other programs such as those written in jpg, tiff, etc. will not be supported. All imported files will be opened as not transparent.
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