The spline tool is responsible for creating Spline Entities
From the Toolbar: Find the spline tool icon  on the Entity Toolbar (color coded blue) and Click on the tool. The tool is now active and ready for use.
From the Shortcut Key: The default shortcut key for the point tool is the letter "Alt + S". Simply press the key and the tool will be activated.
From the Command Line: Type "spline" into the command line, at the top of the Notification Window, and press the Enter/Return key.
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1. Click on the drawing screen to designate a vertex (Fit Point). This will add a spline vertex at this location and then bump those coordinates to the Previous Point field.
2. Repeat Step 1 until all desired fit points have been added.
3. Press  Shift+Enter to finish placing fit points. If Specify Tangents is disabled then the spline will finish and be added to the drawing. Else move your mouse on the drawing screen again and click to specify the directional tangents for the beginning and end of the spline, after this the process will finish and the spline will be added to the drawing.
Reset:
| • | You have just added a spline to the drawing. The tool automatically resets and you can either continue with other tools or add another spline. |
| • | Using reset (Space Bar) at any time while using this tool cancels all previous steps and restarts the tool. |
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To add a spline using typed data open the Tool Tab in the property tree.
1. Type the fit point coordinates into the "Fit Point" 3D Point Property Field found on the Tool Property Tree and press Enter to accept. This will add a vertex and then bump these coordinates to the previous point value.
2. Repeat Step 1 until all desired vertices have been added.
3. Press Shift+Enter to finish placing fit points. If Specify Tangents is disabled then the spline will finish and be added to the drawing. Else specify the angle of the spline's start and end tangents in the "Start Tangent" and "End Tangent" field, after this the process will finish and the spline will be added to the drawing.
Reset:
| • | You have just added a spline to the drawing. The tool automatically resets and you can either continue with other tools or add another spline. |
| • | Using reset (Space Bar) at any time while using this tool cancels all previous steps and restarts the tool. |
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 Right Click: Brings up a Context Menu containing options for this tool.
Specify Tangents: This option allows the user to specify the direction which the beginning and the end of the spline are pointing.
Shift + Enter: This keystroke will either finish and add the spline to the drawing or move the tool from the vertex placement state to the specify-tangent move, depending on the setting of the bool variable, "Specify Tangents"
Escape (Esc): Cancels current tool and activates the default tool (Selection Tool).
Space: Resets this tool.
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Also See:
3D Polyline
Grid
Grid Snaps
Entity Snaps
Notification Bar
