gre.LOG_ALWAYS gre.LOG_ERROR gre.LOG_WARNING gre.LOG_INFO gre.LOG_EVENT gre.LOG_ACTION gre.LOG_DIAG1 gre.LOG_DIAG2 gre.LOG_EVENT2 gre.LOG_TRACE1 gre.LOG_TRACE2
| gre.LOG_ALWAYS | -1 | Always go to stdout |
| gre.LOG_ERROR | 0 | Errors, fatal and non-fatal |
| gre.LOG_WARNING | 1 | Warnings |
| gre.LOG_INFO | 2 | Information, one time, non-repetitive |
| gre.LOG_EVENT1 | 3 | Event delivery, excluding motion/mtevent/redraws |
| gre.LOG_ACTION | 4 | Action execution |
| gre.LOG_DIAG1 | 5 | Storyboard diagnostic informative |
| gre.LOG_DIAG2 | 6 | Storyboard diagnostic detailed |
| gre.LOG_EVENT2 | 7 | Motion/mtevent/redraw event delivery |
| gre.LOG_TRACE1 | 8 | Storyboard minimal tracing |
| gre.LOG_TRACE2 | 9 | Storyboard maximal tracing |