Static Image widget
http://resources.arcgis.com/en/help/flex-viewer/concepts/
The Static Image widget is a simple widget that displays a pre-created static image in the Viewer application user interface (UI). Two common uses of this widget are to display the following:
- Clickable corporate logo
- Static map legend
When clicked, the static image can hyperlink to another web page. It supports the following image formats: PNG, JPEG, and GIF. The following graphic shows the Static Image widget (in the red circle) being used as a corporate logo for the web application. When clicked, it hyperlinks to a corporate web page.
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The Static Image widget can also be used as a static map legend for the Viewer as shown in the following screen shot:
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Since the static image is intended to be part of the Viewer UI, its <widget> tag would be referenced as an independent widget in the Viewer application configuration file, not within a widget container.
See the Static Image widget sample or read its tag reference.