Modo 14.0v2 docs:

Using Polygon Component Tools

Some of Modo's tools are specific to the various component types: vertices, edges, and polygons. For example, there are three component beveling tools, and each has its own settings. The Edge Bevel tool has a rounding option, but the Polygon Bevel tool does not. Some tools are interactive tools, but others are one-shot commands that produce a specific result. You may use some regularly and others only rarely; however, all could be considered indispensable. For information on using a specific tool, click any link below to see its topic.

Polygons
	Detriangulate	Converts triangle pairs to quadrangles by deleting edges to share triangle pairs.
	Triangulate	Converts polygons to triangles.
	Polygon Bevel	Performs a shift and inset on the selected polygons.
	Thicken	Adds dimension to flat geometry.
	Triple	Subdivides any selected polygon with more than 3 vertices so that it consists only of triangle polygons.
	Align	Makes all polygons face the same direction.
	Flip Polygon	Inverts the normal of surface polygons.
	Polygon Extrude	Repositions the selected polygon in space based on the tool's three handles.
	Set Polygon Type	Converts polygon type to Face, Subdivision and Catmull Clark.
	Spikey	Takes selected polygons and adds a vertex to the center of the polygon.
	Split	Draws an edge between two selected vertices of a polygon.
	Merge	Combines selected polygons into a single polygon of n-number of sides.
	Smooth Shift	Smooths out sharp edges in polygonal geometry based on a smoothing angle.
	Inset	Subdivides selected polygons to create new geometry within the original selection.
	Spin Quads	Changes where your edges are attached within the geometry.
	Collapse	Removes the selected element without destroying the integrity of the geometry.
	Shift	Extrudes selected polygons along their individual normal axes.
	Polygon Reduce	Iteratively removes edges from the mesh, while trying to maintain as much of the original contouring as possible.
	Convert to Quadrangles	Converts a series of vertices from an N-gon into a row of regular four sided (quadrangle) polygons.
	Remove	Deletes selected polygons.
	Flip	Reverses the direction of selected polygons.
	PolyScale Offset	Scales a selected polygon on a mesh item.
	PolyScale Offset Detach	Scales a selected polygon on a mesh item and detaches it.
	Flatten Ngons	Flattens Ngons in a model that are not planar.
	Triple Fan	Splits a selected polygon on a selected vertex point.
	Flip It	Flips a selected polygon on a specified axis.
	Unify	Merges two polygons into a single polygon when you have two polygons that are in exactly the same space, and the polygons share the same vertices.