Editing Polylines and Polygons
Water body polygons and retouch polygons and polylines are edited using the commands in the mini toolbar. This toolbar is displayed whenever the polygon/polyline is selected.
To edit a polygon/polyline:
1. Select the polygon/polyline, and then do either of the following:
§ Modify the polygon/polyline shape
2. If you want to select a different object from the one currently being edited, click Select another object 
.
3. If you want to align your polygon/polyline to a surface, click Align to Surface 
. The polyline/polygon's nodes are aligned to the surface.
1. Click the Edit Object icon 
.
2. Do any of the following:
§ If you want to set position based on mouse and snap the polygon/polyline to another object, click Snap Based on Snapping Options icon 
(Shortcut key: 4). See "Setting Snapping Options" in this chapter for information.
§ If you want to set position based on mouse without snapping the polyline/polygon to another object, click Set Position Based on Mouse 
(Shortcut key: 3).
§ If you want to move polygon/polyline in the XY plane, click XY Plane 
.
§ If you want to move the polygon/polyline in the Z plane, click Z Axis 
.
3. Click the polygon/polyline, and drag it to the required location/altitude. Release the left mouse button to set the polygon/polyline at the current location/altitude. If snapping to an object, move and snap the polygon/polyline to an edge or vertex of any existing object.
To modify a polygon/polyline's shape by moving its nodes:
1. Click Edit Nodes 
.
2. Do any of the following:
§ If you want to set position based on mouse and snap the polygon/polyline to another object, click Snap Based on Snapping Options icon (Shortcut key: 4). See "Setting Snapping Options" in this chapter for information.
§ If you want to set position based on mouse without snapping the polygon/polyline to another object, click Set Position Based on Mouse (Shortcut key: 3).
§ If you want to move a node in the XY plane, click XY Plane .
§ If you want to move a node in the Z plane, click Z Axis .
3. In the 3D Window, place the cursor over one of the polyline/polygon’s nodes. The node turns blue.
4. Click the node and drag it to the required location in the XY/Z Plane. Release the mouse button to set the node at the current location.
Setting Snapping Options
You can set how a node or object snaps to other objects.
To set snapping options:
1. Select a single object for editing.
2. On the top bar of the object’s property sheet or mini toolbar, click Set Snapping Options 
.
3. Toggle on any of the following options:
§ Node Snapping – Snap object or node to nodes of other objects or features.
§ Line Segment Snapping – Snap object or node to line segments of other objects or features.
§ 3D Snapping – Smart snap object or node to dynamically-identified edges and corners of any element in the 3D World.
§ Directional Snapping – Constrain the object line segments currently being drawn to pre-defined angle increments. The angle constraint can either be absolute, i.e., relative to true north or relative to the previous line segment.
§ Segment Distance on Edit – Show segment lengths while editing a polygon/polyline.