SolidWorks Sketch Relations Summary

SolidWorks Online Help provides a summary of all of the sketch relations available in SolidWorks.  It is provided here http://help.solidworks.com/2014/English/solidworks/sldworks/c_Description_of_Sketch_Relations.htm

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.

Relation Entities to select Resulting 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.
VerticalVertical 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.
ColinearCollinear Two or more lines. The items lie on the same infinite line.
CoradialCoradial Two or more arcs. The items share the same centerpoint and radius.
PerpendicularPerpendicular Two lines. The two items are perpendicular to each other.
ParallelParallel Two 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 YZParallelYZ A 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 ZXParallelZX A 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 ZAlongZ A 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.
TangentTangent An arc, ellipse, or spline, and a line or arc. The two items remain tangent.
Concentric2Concentric Two or more arcs, or a point and an arc. The arcs share the same centerpoint.
MidpointMidpoint Two lines or a point and a line. The point remains at the midpoint of the line.
IntersectionIntersection Two lines and one point. The point remains at the intersection of the lines.
CoincidentCoincident A point and a line, arc, or ellipse. The point lies on the line, arc, or ellipse.
EqualEqual Two or more lines or two or more arcs. The line lengths or radii remain equal.
Equal CurvatureEqual Curvature Two splines. The radius of curvature and the vector (direction) matches between the two splines.
SymmetricSymmetric A centerline and two points, lines, arcs, or ellipses. The items remain equidistant from the centerline, on a line perpendicular to the centerline.
FixFix Any 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 Slot A slot sketch entity. The entity’s size and location are fixed.
PiercePierce A 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 Points Two sketch points or endpoints. The two points are merged into a single point.
Double DistanceDoubled Distance A centerline and any sketch entity. The sketch entity is dimensioned at twice the distance from the centerline.
Equal SlotsEqual Slots Two or more slot sketch entities. The items have equal lengths and radii.
On EdgeOn Edge Edges 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 Plane Sketch entities on a plane. The sketch entities reside on the plane.
On SurfaceOn Surface Sketch entities on a surface. The sketch entities reside on the surface.
Tangent FaceTangent to Face A sketch entity and a solid face. The sketch entity and face are made tangent to one another.
TractionTraction See Using Traction and Belts for Layout Sketches.

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