I am reading the X-Plane SDK to understand the workings of GIZMO. I have made a table with the drawing phases of the X-Plane SDK and the drawing events of Gizmo. After combining that info I got some questions: Why is the event OnDrawBeforeLastScene categorized as a 2D event in the Gizmo API, while the corresponding xplm_Phase is a 3D drawing phase according to the X-Plane SDK At which phases do the 'Before' events occur? According to the name I classified them as the first event in the xplm_Phase with the corresponding name. The description in the Gizmo API at OnDraw_BeforeGauges seems to say that the event is the last event of the former phase. I am not sure about classifying the OnDraw_Gauges_3D and OnDraw_BeforeGauges_3D events? Are they part of the xplm_Phase_Panel? Are there no corresponding events for xplm_Phase_LocalMap3D?Gizmo API: http://www.gizmo64.com/Gizmo64_API.htm#OnDraw_BeforeFirstCockpit X-Plane SDK: http://www.xsquawkbox.net/xpsdk/mediawiki/XPLMDisplay Drawing events in Gizmo.pdf