Identify the Sketch Source Plane
You can now identify which face or plane a sketch was initially created on. Select a sketch in the browser and select Show Input in the context menu to display the source plane or face.
Create Tangent Dimensions Between Circular or Arc Geometry Within a 2D Sketch
You can now create tangent dimensions between circular or arc geometry within a 2D sketch. This workflow will allow you to fully constrain a circle using tangent dimensions instead of a traditional diameter dimension, or the use of the center point of the circle.
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-3F1A1020-601A-44E5-919F-2C36A3C791C7.png)
The Show/Hide All Constraints Display Setting Persists
The selected Show All or Hide All Constraints display setting remains active as you sketch and throughout your editing session. Previously the show or hide setting did not persist when you created new geometry or when you started a new sketch.
Hide Sketch Dimensions
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-24E09CFD-081A-44F8-A09F-079AF7C52E3F.png)
Consistency in Sketch Sharing
When sharing a sketch, by dragging it above its feature within the browser, it is now automatically made visible. The visibility state of the shared sketch is now consistent with the context menu method of choosing Share Sketch.
3D Sketch Wrap to Surface
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-57A9BC36-1A1D-442D-B2B8-F41193F0662C.png)
New Snap Points in the Context Menu
- Endpoint
- Apparent Intersection
- Quadrant
- Mid of 2 points
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-C2264DBC-A40F-4F7D-AC86-E1C6184D5826.png)
3D Sketch Silhouette Curve
The create silhouette curve command includes new options. You can now choose to exclude selected faces, straight faces, and internal faces from curve generation.
![](https://help.autodesk.com/cloudhelp/2018/ENU/InventorLT-WhatsNew/images/GUID-06E61498-B005-4EF5-ADA8-2CAEEE2F8683.png)