Share Email Facebook Twitter LinkedIn Video: Construction Lines and Centerlines This video discusses construction lines and centerlines for 2D sketch mode in Autodesk Inventor. The video also shows basic concepts of how 2D sketches are extruded. Video Player is loading.PlayPlayMuteCurrent Time 0:00/Duration 4:07Loaded: 0%0:00Progress: 0% Playback Rate2x1.5x1.25x1x, selected0.5x1xDescriptionsdescriptions off, selectedCaptionscaptions off, selectedChaptersAudio TrackFullscreenThis is a modal window.