New in V9
ExportBlockAttributes
Saves block definition properties and attribute user text of the selected block instances to a .csv file.
CopyToClipboardAt
Specifies a base point when copying objects to the Clipboard.
CutAt
Specifies a base point when cutting objects to the Clipboard.
PasteAt
Inserts objects from the Clipboard referencing a base point.
PasteAsBlock
Creates a block definition from objects in the Clipboard and inserts it into the model.
NextDetail
Activates the next detail view in a layout.
PrevDetail
Activates the previous detail view in a layout.
SetDetailBorder
Replaces a detail view's border, which is usually rectangular, with a closed curve.
Layouts (Group and manage layouts)
Opens the Layouts panel that manages the layouts in the model.
StretchCrv
Lets you select a curve's control points that are off with a crossing window to move them.
SplitPointCloud
Lets you draw a line to cut a point cloud into multiple parts.
Uses surface edges, curves and points as input constraints to create a surface with positional (G0), tangential (G1) or curvature (G2) continuity to the input geometry. 
Patch
GeometricTolerance
Creates a geometric-tolerance feature control frame as an annotation text object in the model.
DimUserText
Creates leader annotations using attribute user text set in the selected object's Properties.
HatchPattern
Creates a new hatch pattern from curves, deletes an existing hatch pattern, or imports hatch patterns from a .3dm or .pat file.
Markup
Annotates over viewports to communicate ideas or provide feedback without touching the model geometry.
SoftTransform
Opens the Soft Transform panel that allows editing object grips with different falloff types within a specified range.
SubDMatch
Modifies the shape of a SubD by mapping its edge chain to a target chain of curves or edges from SubD, mesh, or surface objects.
IsolateToViewports
Makes the selected objects visible only in the chosen viewports and hidden in all others.
UnisolateFromViewports
Restores visibility of objects previously limited to specific viewports by the IsolateToViewports command.
GlobalEdgeContinuity
Analyzes G0, G1, and G2 continuity between multiple surfaces and displays interactive visual feedback for evaluation.
ScaleEach
Scales multiple objects independently from each object’s own origin point using different scaling methods.
ArrayCrv
Creates copies of selected objects along a curve, with an interactive preview and controls for array settings.
UndoSelection
Reverts the most recent selection change of objects, sub-objects, and object grips.
RedoSelection
Reapplies selection changes that were undo with the UndoSelection command.
ClearUndoSelection
Deletes the selection-change history used by UndoSelection and RedoSelection commands.
OptionsExport
Save Options settings to a file.
OptionsImport
Restore Options settings from a file.
ZoomClippingDrawings
Zooms the current viewport to enclose the clipping drawings of selected clipping planes.
ClippingDrawings
Extracts sections and background geometry of clipping planes to generate 2D drawings on the World Top plane at the picked locations.
CreateTemplateDrawing
Creates a set of reference layers for the ClippingDrawings command to inherit properties such as color, linetype, and print width for its output layers.
EditClippingDrawings
Updates the option settings for existing clipping drawings.
AddGuide, AutoHide
Controls whether infinite construction guides are always visible or appear only when a command requests picking a point.
ImportGuides
Reads infinite construction guides from a 3dm file into the current model.
More
Opens the Learn about all Rhino 9 WIP features post.