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SOLIDWORKS Sketch Relations Summary

Article by Adam Bridgman, CSWE created/updated January 14, 2014

The SOLIDWORKS Online Help provides a summary of all of the SOLIDWORKS sketch relations available.

There is something missing from this table, it should show the icons associated with each relation.  These are the symbols you see when you select the entities described under entities to select.

So I have copied the table from the link and added the missing images for your reference.

RelationEntities to selectResulting relations
HorizontalHorizontal One or more lines or two or more points.The lines become horizontal or vertical (as defined by the current sketch space). Points are aligned horizontally or vertically.
VerticalVerticalOne or more lines or two or more points.The lines become horizontal or vertical (as defined by the current sketch space). Points are aligned horizontally or vertically.
ColinearCollinearTwo or more lines.The items lie on the same infinite line.
CoradialCoradialTwo or more arcs.The items share the same centerpoint and radius.
PerpendicularPerpendicularTwo lines.The two items are perpendicular to each other.
ParallelParallelTwo or more lines.A line and a plane (or a planar face) in a 3D sketch.The items are parallel to each other.The line is parallel to the selected plane.
Parallel YZParallelYZA line and a plane (or a planar face) in a 3D sketch.The line is parallel to the YZ plane with respect to the selected plane.
Parallel ZXParallelZXA line and a plane (or a planar face) in a 3D sketch.The line is parallel to the ZX plane with respect to the selected plane.
Along ZAlongZA line and a plane (or a planar face) in a 3D sketch.The line is normal to the face of the selected plane.
Along Z Along Y Along X
Relations to the global axes are called AlongX, AlongY, and AlongZ. Relations that are local to a plane are called Horizontal, Vertical, and Normal.
TangentTangentAn arc, ellipse, or spline, and a line or arc.The two items remain tangent.
Concentric2ConcentricTwo or more arcs, or a point and an arc.The arcs share the same centerpoint.
MidpointMidpointTwo lines or a point and a line.The point remains at the midpoint of the line.
IntersectionIntersectionTwo lines and one point.The point remains at the intersection of the lines.
CoincidentCoincidentA point and a line, arc, or ellipse.The point lies on the line, arc, or ellipse.
EqualEqualTwo or more lines or two or more arcs.The line lengths or radii remain equal.
Equal CurvatureEqual CurvatureTwo splines.The radius of curvature and the vector (direction) matches between the two splines.
SymmetricSymmetricA centerline and two points, lines, arcs, or ellipses.The items remain equidistant from the centerline, on a line perpendicular to the centerline.
FixFixAny entity.The entity’s size and location are fixed. However, the end points of a fixed line are free to move along the infinite line that underlies it. Also, the endpoints of an arc or elliptical segment are free to move along the underlying full circle or ellipse.
Fix SlotFix SlotA slot sketch entity.The entity’s size and location are fixed.
PiercePierceA sketch point and an axis, edge, line, or spline.The sketch point is coincident to where the axis, edge, or curve pierces the sketch plane. The pierce relation is used in sweeps with guide curves.
MergeMerge PointsTwo sketch points or endpoints.The two points are merged into a single point.
Double DistanceDoubled DistanceA centerline and any sketch entity.The sketch entity is dimensioned at twice the distance from the centerline.
Equal SlotsEqual SlotsTwo or more slot sketch entities.The items have equal lengths and radii.
On EdgeOn EdgeEdges of a solid.The edges of the solid are projected to the sketch plane using the Convert Entities Tool_Convert_Entities_Sketch.gif tool.
On PlaneOn PlaneSketch entities on a plane.The sketch entities reside on the plane.
On SurfaceOn SurfaceSketch entities on a surface.The sketch entities reside on the surface.
Tangent FaceTangent to FaceA sketch entity and a solid face.The sketch entity and face are made tangent to one another.
TractionTractionSee Using Traction and Belts for Layout Sketches.

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