Used to graphically define grid lines which do not fit into the traditional definition of either orthogonal or radial grid systems providing you the necessary freedom to define unique grid systems and remove limitations and constraints of a table based definitions (orthogonal and radial).

• Grid Systems dialog (Sketch grid): Grid Lines Settings > Add/Modify

Setting	Description
Axis Groups	Sketch Grids are created with 2 or 3 axis groups. An "axis group" is simply a convenient way to organize a collection of grid lines. Axis groups are not limited to any specific axis orientation or direction. Grid lines in one axis group can differ significantly in geometry, orientation and direction from the other gridlines in the same axis group. Also, the axis group may exist to share a common labeling structure. Note: Sketch Grids support either two or three axes, not more. This is because many industry standards for data exchange support only orthogonal, radial (UAxes & VAxes) and triangular (UAxes, VAxes &WAxes) grid definitions. If you require more than 3 axes, you can combine multiple grid system definitions to achieve the desired results.
Label	Defines the grid line label assignment for the next grid line to be created. It also establishes the label starting sequence for subsequent grid lines.
Labeling Options	Determines if the label is displayed at the ends of the grid line. You can choose to have the label automatically attached on both ends, just on the start end, just on the finish end, or no labels at all on either end.
Create Grid Line from Element	Promotes 2D elements (lines, arcs, line strings, b-splines, shapes) to grid lines including 2D elements in reference files.
Place Line	Places a single linear grid line by two points, start and end, and remains active after each placement.
Sketch Arc Grid Lines	You can place a single arc grid line by three points. The order of the three points depends on the placement methods available on the menu. Arc (Start, Center, End) - Places a single arc grid line by three points, start, center, and end, and remains active after each placement. Arc (Center, Start, End) - Places a single arc grid line by three points, center, start and end, and remains active after each placement. Arc (Start, Mid, End) - Places a single arc grid line by three points, start, mid and end, and remains active after each placement. Arc (Start, End, Mid) - Places a single arc grid line by three points, start, end and mid, and remains active after each placement.
Sketch Multiple Segment Grid Line	When selected, the multiple segment grid line placement functionality is enabled, which changes the Add/Modify Grid Lines toolbar. Drawing elements for the multiple segment grid line placement mode are restricted to the linear (Place Line) and Sketch Arc Grid Lines tools. Hence, they are enabled. Grid axis and labeling controls (Axis Group, Label and Label Options) tools remain active for you to set for the multiple segment grid lines you are drawing. The two finish and cancel multiple segment grid line placement controls are also enabled (disabled when is deselected). Grid line manipulation and alignment tools are disabled as well as the Finish () tool. The Cancel () tool remains active. Add/Modify Grid Lines toolbar in Multiple Segment Grid Line Sketch Mode.
Finish Multiple Segment Sketch	Enabled when the Sketch Multiple Segment Grid Line tool () places the first multi-segmented element. Click when all segments are complete.
Cancel Multiple Segment Sketch	Enabled when the Sketch Multiple Segment Grid Line tool () places the first multi-segmented element. Click to cancel and delete the current multi-segmented grid line.
Select Grid Line	Selects grid lines for modification. The editable grid line properties vary depending upon what is selected: Single Selection - You can edit Axis Group, Label and Labeling Options. The selected grid line populates these properties with the values it was defined with, preparing them for editing. Multiple Selection - You can bulk edit the Axis Group in which the selected grid lines belong. If a grid line from multiple Axis Groups are selected, the Axis Group displays grey field. If the grids are in the same Axis Group, then that Axis Group name is displayed. If you change the Axis Group selection, all the selected grid lines are reassigned to the new Axis Group, regardless of their original assignment. Similarly, you can change the Labelling option to grids in selection set. Tip: Undo returns them to their previous state. Multiple selection does not allow you to edit the Label (the input field disabled). You can bulk edit the Grid Line Labeling options.
Manipulate Grid Lines	You can manipulate grid lines with the tools available here. Copy - Copies grid lines, and increments their Label value. Grid lines can be copied individually, as a selected group, or within a fence. If additional Copies are specified, the grid line labels for all copies are incremented. Move - Moves grid lines. Grid lines can be moved individually, as a selected group, or within a fence. Rotate - Rotates grid lines. Grid lines can be rotated individually, as a selected group, or within a fence. If Copies is specified, the grid line labels for all copies are incremented. Also, when About Element Center is turned on, selected grid lines are rotated about their (individual) center points. Mirror - Mirrors grid lines. Grid lines can be mirrored individually, as a selected group, or within a fence. If Copies is specified, the grid line labels for all copies are incremented. Also, when About Element Center is turned on, selected grid lines are mirrored about their (individual) center points. Array - Copies grid lines many times to create an array. Arrays can be rectangular, polar or can be constructed along a path element. Grid line labels for all copies are incremented. Move Parallel - Moves and copies grid lines parallel to the originals. Whole grid lines, segments or selected portions of grid lines can be moved and copied. If Make a Copy is specified or the Segment and Portion selected modes are specified, the grid line labels for all copies are incremented.
Align	You can align grid lines to other grid lines with the tools available here. Align Left - Aligns grid lines to the left edge of the Range Block your selected "base grid line" occupies. You can align grid lines individually by selecting them with data points (select, accept) or you can draw a fence to select multiple grid lines. Align Center - Aligns grid lines vertically to the center point of the Range Block your selected "base grid line" occupies. You can align grid lines individually by selecting them with data points (select, accept) or you can draw a fence to select multiple grid lines. Align Right - Aligns grid lines to the right edge of the Range Block your selected "base grid line" occupies. You can align grid lines individually by selecting them with data points (select, accept) or you can draw a fence to select multiple grid lines. Align Top - Aligns grid lines to the top edge of the Range Block your selected "base grid line" occupies. You can align grid lines individually by selecting them with data points (select, accept) or you can draw a fence to select multiple grid lines. Align Middle - Aligns grid lines horizontally to the center point of the Range Block your selected "base grid line" occupies. You can align grid lines individually by selecting them with data points (select, accept) or you can draw a fence to select multiple grid lines. Align Bottom - Aligns grid lines to the bottom edge of the Range Block your selected "base grid line" occupies. You can align grid lines individually by selecting them with data points (select, accept) or you can draw a fence to select multiple grid lines.
Delete Grid Line	Deletes grid lines. You can delete grid lines individually or as a selected group (use Main Building > Selection > Element Selection not the Select Grid Line tool).
Finish	Completes the Sketch Grids session, and returns you to Grid Systems dialog and the 3D model.
Cancel	Deletes all changes in the current Sketch Grids session, and returns you to Grid Systems dialog and the 3D model.