Block Editor

BEDIT (Command) Find

You use the Block Editor to define the objects and behavior for a block definition. In the Block Editor, you add parameters and actions, which define custom properties and dynamic behavior.

The following commands are used for editing blocks and are available only in the Block Editor:

BACTION
BACTIONBAR
BACTIONSET
BACTIONTOOL
BASSOCIATE
BATTORDER
BAUTHORPALETTE
BAUTHORPALETTECLOSE
BCLOSE
BCPARAMETER (not in AutoCAD LT)
BCYCLEORDER
BCONSTRUCTION
BGRIPSET
BLOOKUPTABLE
BPARAMETER
BSAVE
BSAVEAS
BTABLE
BTESTBLOCK
BVHIDE
BVSHOW
BVSTATE

When the BLOCKEDITLOCK system variable is set to 1, the Block Editor cannot be opened.

The Block Editor also provides a Block Editor toolbar and Block Authoring palettes that contain tools for creating dynamic blocks. The Block Authoring Palettes window contains the following tabs:

Block Editor Tab

Provides tools for working in the Block Editor, creating dynamic blocks, and working with visibility states.

Edit or Create Block Definition: Displays the Edit Block Definition dialog box.
Save Block Definition: Saves the current block definition.
Save Block As: Saves a copy of the current block definition under a new name.
Name: Displays the name of the current block definition.
Test Block (BTESTBLOCK): Displays a window within the Block Editor to test a dynamic block.
Automatically Constrain Objects (AUTOCONSTRAIN) - Not available in AutoCAD LT: Applies geometric constraints to a selection set of objects based on orientation of the objects relative to one another.
Apply Geometric Constraint (GEOMCONSTRAINT) - Not available in AutoCAD LT: Applies or persists geometric relationships between objects or points on objects.
Display / Hide Constraints Bar (CONSTRAINTBAR): Displays or hides the geometric constraints on an object.
Parameter Constraint (BCPARAMETER) - Not available in AutoCAD LT: Applies constraint parameters to selected objects, or converts dimensional constraints to parameter constraints.
Block Table (BTABLE) - Not available in AutoCAD LT: Displays a dialog box to define variations of a block.
Parameter (BPARAMETER): Adds a parameter with grips to a dynamic block definition.
Action (BACTION): Adds an action to a dynamic block definition.
Define Attribute (Attribute Definition Dialog Box): Creates an attribute definition for storing data in a block.
Authoring Palettes (BAUTHORPALETTE): Opens the Block Authoring Palettes window in the Block Editor.
Parameters Manager (PARAMETERS): Opens the Parameters Manager palette that includes all dimensional constraint parameters, reference parameters, and user variables in the current drawing.
Visibility Mode (BVMODE): Controls how objects that are made invisible for the current visibility state are displayed in the Block Editor.
Make Visible (BVSHOW): Makes objects visible in the current visibility state or all visibility states in a dynamic block definition.
Make Invisible (BVHIDE): Makes objects invisible in the current visibility state or all visibility states in a dynamic block definition.
Manage Visibility States (Visibility States Dialog Box): Creates, sets, or deletes a visibility state in a dynamic block.
Visibility State: Specifies the current visibility state displayed in the Block Editor.
Close Block Editor (BCLOSE): Closes the Block Editor.

Block Editor Toolbar

The Block Editor toolbar is displayed when the ribbon is not active. It is also displayed only when you enter the Block Editor with the ribbon closed.

Parameters Tab (Block Authoring Palettes Window)

Provides tools for adding parameters to a dynamic block definition in the Block Editor based on the options of the BPARAMETER command. Parameters specify positions, distances, and angles for geometry in the block reference. When you add a parameter to a dynamic block definition, it defines one or more custom properties for the block.

Point Parameter: Adds a point parameter to the dynamic block definition and defines custom X and Y properties for the block reference. A point parameter defines an X and Y location in the drawing. In the Block Editor, a point parameter looks similar to an ordinate dimension.
Linear Parameter: Adds a linear parameter to the dynamic block definition and defines a custom distance property for the block reference. A linear parameter shows the distance between two anchor points. A linear parameter constrains grip movement along a preset angle. In the Block Editor, a linear parameter looks similar to an aligned dimension.
Polar Parameter: Adds a polar parameter to the dynamic block definition and defines custom distance and angle properties for the block reference. A polar parameter shows the distance between two anchor points and displays an angle value. You can use both grips and the Properties palette to change both the distance value and the angle. In the Block Editor, a polar parameter looks similar to an aligned dimension.
XY Parameter: Adds an XY parameter to the dynamic block definition and defines custom horizontal and vertical distance properties for the block reference. An XY parameter shows the X and Y distances from the base point of the parameter. In the Block Editor, an XY parameter displays as a pair of dimensions (horizontal and vertical). These dimensions share a common base point.
Rotation Parameter: Adds a rotation parameter to the dynamic block definition and defines a custom angle property for the block reference. A rotation parameter defines an angle. In the Block Editor, a rotation parameter displays as a circle.
Alignment Parameter: Adds an alignment parameter to the dynamic block definition. An alignment parameter defines an X and Y location and an angle. An alignment parameter always applies to the entire block and needs no action associated with it. An alignment parameter allows the block reference to automatically rotate around a point to align with other objects in the drawing. An alignment parameter affects the angle property of the block reference. In the Block Editor, an alignment parameter looks like an alignment line.
Flip Parameter: Adds a flip parameter to the dynamic block definition and defines a custom flip property for the block reference. A flip parameter flips objects. In the Block Editor, a flip parameter displays as a reflection line. Objects can be flipped about this reflection line. A flip parameter displays a value that shows if the block reference has been flipped or not.
Visibility Parameter: Adds a visibility parameter to the dynamic block definition and defines a custom visibility property for the block reference. With visibility parameter, you can create visibility states and control the visibility of objects in the block. A visibility parameter always applies to the entire block and needs no action associated with it. In a drawing, you click the grip to display a list of visibility states available for the block reference. In the Block Editor, a visibility parameter displays as text with an associated grip.
Lookup Parameter: Adds a lookup parameter to the dynamic block definition and defines custom lookup properties for the block reference. A lookup parameter defines a custom property that you can specify or set to evaluate to a value from a list or table you define. It can be associated with a single lookup grip. In the block reference, you click the grip to display a list of available values. In the Block Editor, a lookup parameter displays as text.
Base Point Parameter: Adds a base point parameter to the dynamic block definition. A base point parameter defines a base point for the dynamic block reference relative to the geometry in the block. A base point parameter cannot be associated with any actions, but can belong to an action's selection set. In the Block Editor, a base point parameter displays as a circle with crosshairs

Actions Tab (Block Authoring Palettes Window)

Provides tools for adding actions to a dynamic block definition in the Block Editor based on the options of the BACTIONTOOL command. Actions define how the geometry of a dynamic block reference move or change when the custom properties of a block reference are manipulated in a drawing. You associate actions with parameters.

Move Action: Adds a move action to the dynamic block definition when you associate the action with a point, linear, polar, or XY parameter. A move action is similar to the MOVE command. In a dynamic block reference, a move action causes objects to move a specified distance and angle.
Scale Action: Adds a scale action to the dynamic block definition when you associate the action with a linear, polar, or XY parameter. A scale action is similar to the SCALE command. In a dynamic block reference, a scale action causes its selection set to scale when the associated parameter is edited by moving grips or by using the Properties palette.
Stretch Action: Adds a stretch action to the dynamic block definition when you associate the action with a point, linear, polar, or XY parameter. A stretch action causes objects to move and stretch a specified distance in a specified location.
Polar Stretch Action: Adds a polar stretch action to the dynamic block definition when you associate the action with a polar parameter. A polar stretch action rotates, moves, and stretches objects a specified angle and distance when the key point on the associated polar parameter is changed through a grip or the Properties palette
Rotate Action: Adds a rotate action to the dynamic block definition when you associate the action with a rotation parameter. A rotate action is similar to the ROTATE command. In a dynamic block reference, a rotate action causes its associated objects to rotate when the associated parameter is edited through a grip or the Properties palette.
Flip Action: Adds a flip action to the dynamic block definition when you associate the action with a flip parameter. With a flip action you can flip a dynamic block reference about a specified axis called a reflection line.
Array Action: Adds an array action to the dynamic block definition when you associate the action with a linear, polar, or XY parameter. An array action causes its associated objects to copy and array in a rectangular pattern when the associated parameter is edited through a grip or the Properties palette.
Lookup Action: Adds a lookup action to the dynamic block definition. When you add a lookup action to a dynamic block definition and associate it with a lookup parameter, it creates a lookup table. You can use a lookup table to assign custom properties and values to a dynamic block.

Parameter Sets Tab (Block Authoring Palettes Window)

Provides tools for adding a parameter and at least one action at the same time to a dynamic block definition in the Block Editor. When you add a parameter set to a dynamic block, the actions are automatically associated with the parameter. After you add a parameter set to a dynamic block, you double-click the yellow alert icon (or use the BACTIONSET command) and follow the Command prompts to associate the action with a selection set of geometry.

Point Move: Automatically adds a move action associated with the point parameter.
Linear Move: Automatically adds a move action associated with the endpoint of the linear parameter.
Linear Stretch: Automatically adds a stretch action associated with the linear parameter.
Linear Array: Automatically adds an array action associated with the linear parameter.
Linear Move Pair: Automatically adds a two move action, one associated with the base point and one associated with the endpoint of the linear parameter.
Linear Stretch Pair: Automatically adds two stretch actions, one associated with the base point and one associated with the endpoint of the linear parameter.
Polar Move: Automatically adds a move action associated with the polar parameter.
Polar Stretch: Automatically adds a stretch action associated with the polar parameter.
Polar Array: Automatically adds an array action associated with the polar parameter.
Polar Move Pair: Automatically adds two move actions, one associated with the base point and one associated with the endpoint of the polar parameter.
Polar Stretch Pair: Automatically adds two stretch actions, one associated with the base point and one associated with the endpoint of the polar parameter.
XY Move: Automatically adds a move action associated with the endpoint of the XY parameter.
XY Move Pair: Automatically adds two move actions, one associated with the base point and one associated with the endpoint of the XY parameter.
XY Move Box Set: Automatically adds four move actions, one associated with each key point on the XY parameter.
XY Stretch Box Set: Automatically adds four stretch actions, one associated with each key point on the XY parameter.
XY Array Box Set: Automatically adds an array action associated with the XY parameter.
Rotation Set: Automatically adds a rotation action associated with the rotation parameter.
Flip Set: Automatically adds a flip action associated with the flip parameter.
Visibility Set: Adds a visibility parameter to the dynamic block definition and allows visibility states to be defined. No action is necessary with the visibility parameter.
Lookup Set: Automatically adds a lookup action associated with the lookup parameter.

Constraints Tab (Block Authoring Palettes Window) - Not available in AutoCAD LT

Provides tools for applying geometric constraints and constraint parameters to objects. When you apply geometric constraint to a pair of objects, the order in which the objects are selected and the point on which each object is selected can affect how the objects are positioned relative to each other.

Geometric Constraints

Applies geometric constraints to selected objects.

Coincident Constraint: Constrains two points together or a point to a curve (or an extension of a curve). Starts the GCCOINCIDENT command.
Perpendicular Constraint: Causes selected lines to lie 90 degrees to one another. Starts the GCPERPENDICULAR command.
Parallel Constraint: Causes selected lines to lie parallel to each other. Starts the GCPARALLEL command.
Tangent Constraint: Constrains two curves to maintain a point of tangency to each other or their extensions. Starts the GCTANGENT command.
Horizontal Constraint: Causes lines or pairs of points to lie parallel to the X axis of the current coordinate system. Starts the GCHORIZONTAL command.
Vertical Constraint: Causes lines or pairs of points to lie parallel to the Y axis of the current coordinate system. Starts the GCVERTICAL command.
Collinear Constraint: Causes two or more line segments to lie along the same line. Starts the GCCOLLINEAR command.
Concentric Constraint: Constrains two arcs, circles, or ellipses to the same center point. Starts the GCCONCENTRIC command.
Smooth Constraint: Constrains a spline to be contiguous and maintain G2 continuity with another spline, line, arc, or polyline. Starts the GCSMOOTH command.
Symmetric Constraint: Causes selected objects to become symmetrically constrained about a selected line. Starts the GCSYMMETRIC command.
Equal Constraint: Resizes selected arcs and circles to the same radius, or selected lines to the same length. Starts the GCEQUAL command.
Fix Constraint: Locks points and curves in position. Starts the GCFIX command.

Constraint Parameters

Applies constraint parameters to selected objects, or converts dimensional constraints to parameter constraints based on the options of the BCPARAMETER command.

Aligned Constraint: Constrains the length of a line or the distance between two lines, a point on an object and a line, or two points on different objects.
Horizontal Constraint: Constrains the X distance of a line or between two points on different objects. Valid objects include lines and polyline segments.
Vertical Constraint: Constrains the Y distance of a line or between two points on different objects. Valid objects include lines and polyline segments.
Angular Constraint: Constrains the angle between two lines or polyline segments. It is similar to an angular dimension.
Radial Constraint: Constrains the radius of a circle, arc, or polyarc segment.
Diameter Constraint: Constrains the diameter of a circle, arc, or polyarc segment.