The PROPERTIES command (alias Ctrl + 1), one of the most used in AutoCAD, is also excellent for modifying the parameters that define solids or surfaces. The command displays a floating palette that can be always visible and that displays the parameters and properties of the selected object.

Selecting a solid, there are three panels related to 3D, namely, 3D Visualization, Geometry, and Solid History. The first one includes the material and shadow display only important for renderings and the last one includes history parameters for composite objects. As in 2D, under Geometry, we can verify and modify all relevant parameters of the solid or surface selected. By selecting a surface, besides Visualization and Geometry, two additional panels are available, namely, Surface Associativity and Trims, where we control associativity between surfaces and original lines and trims applied to surfaces.

The QUICKPROPERTIES command (alias QP) also displays a properties palette, but one that is condensed to the most important parameters and near the object. For most objects, this is the command displayed when double-clicking over that object.

Another way to apply the Quick Properties palette is to turn on the QP | Quick Properties button on the Status bar (or press Ctrl + Shift + P). With this mode activated, it is enough to select an object, without command, and the palette is immediately displayed.

The SOLIDEDIT command (no alias) allows us to modify faces, edges, and volumes (here called bodies) of solids. To apply this command, it is faster to use the Solid Editing toolbar or the ribbon, Home | Solid Editing; we jump directly to the wanted option.

The interaction with the command starts by displaying whether the verification of solids accuracy is turned on (the SOLIDCHECK variable):

Command: SOLIDEDIT
Solids editing automatic checking: SOLIDCHECK=1

Next, the main command options are displayed. Undo undoes the last command operation and eXit ends the command. The remaining options are presented next:

Enter a solids editing option [Face/Edge/Body/Undo/eXit] <eXit>: Option

Enter a face editing option
[Extrude/Move/Rotate/Offset/Taper/Delete/Copy/coLor/mAterial/Undo/eXit] <eXit>: Option

Enter an edge editing option [Copy/coLor/Undo/eXit] <eXit>: Option

Enter a body editing option
[Imprint/seParate solids/Shell/cLean/Check/Undo/eXit] <eXit>: Option

The OFFSETEDGE command (no alias), available since Version 2012, allows us to create a polyline or a spline parallel to the edge of a planar face of solids or surfaces. By default, the command prompts for the face and a point where it will pass the new linear object.

The command displays the default corner value and prompts for a planar face selection:

Command: OFFSETEDGE
Corner = Sharp
Select face: Selection

Then, by default, it prompts for a point where the new linear object will pass. It can be outwards or inwards, related to the face's edges:

Specify through point or [Distance/Corner]: Point

The face selection and point prompts are repeated until the Enter or Esc key is pressed:

Select face: Enter

This command has the following options:

The SURFEXTRACTCURVE command (no alias), which is new in Version 2013, allows us to obtain curves (isolines) from surfaces or solids. The new objects can be lines, arcs, polylines, or splines. The command starts by displaying the default value of the Chain option and prompts for the selection of one surface, solid, or face:

Command: SURFEXTRACTCURVE
Chain = No
Select a surface, solid, or face: Selection

Specifying a point over the surface creates a curve. The prompt is repeated until the command is ended:

Extracting isoline curve in U direction
Select point on surface or [Chain/Direction/Spline points]: Point
Extracting isoline curve in U direction
Select point on surface or [Chain/Direction/Spline points]: Enter

This command has the following options:

The PROJECTGEOMETRY command (no alias), available since Version 2011, allows you to project points and linear objects on solids and surfaces. This projection may cut the solid or surface. The command starts by displaying the value of the SURFACEAUTOTRIM variable and prompts for the selection of curves or points to a project:

Command: PROJECTGEOMETRY
SurfaceAutoTrim = 0
Select curves, points to be projected or [PROjection direction]: Selection

After the selection of objects to be projected, we select one solid, surface, or region:

Select a solid, surface, or region for the target of the projection: Selection

Finally, we specify the projection direction between the viewing direction, the current UCS, or by marking two points:

Specify the projection direction [View/Ucs/Points] <View>: Option

The command has the following option:

The IMPRINT command (no alias) allows you to create edges from intersections of solids and surfaces with linear entities, regions, or solids. This command is equivalent to the SOLIDEDIT Imprint option, the only difference being that IMPRINT can also be applied to surfaces.