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# log viewer
The log viewer provides a look at Furnace's internal messages. This can be useful for chasing down problems.
![log viewer dialog ](log-viewer.png )
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If the **Follow** checkbox is enabled, the log will snap to the bottom and continually scroll to show the newest messages. If disabled, it will stay put on what's currently shown.
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The **Level** dropdown determines the minimum importance of the messages displayed.
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| level | message shown |
|---|---|
| ERROR | serious problem |
| warning | may or may not be a problem |
| info | significant information |
| debug | general info about what Furnace is doing |
| trace | detailed info useful only to developers |