Toolbar Menu Status bar


Not on menus.

Record History

The History command stores the connection between a command's input geometry and the result so that when the input geometry changes, the result updates accordingly.

For example, with History recording and Update turned on, a lofted surface can be changed by editing the input curves.


  1. In the status bar, click the Record History pane.
  2. Use a history-enabled command such as the Loft command to make a surface from input curves.
  3. Edit the input curves.
    The surface updates.
Command-line options


Controls the default Record History setting.

In general, it is best to leave the Record option set to No and use the Record History status bar pane to selectively record history. Recording history uses computer resources and makes saved files larger.


Allows output to automatically update when input is edited. This may be slow or may interfere with your workflow.

If the option is set to No, use the HistoryUpdate command to manually update the objects.


Locks child objects created with History to discourage direct geometry editing of the child object. Editing the child object directly will break the history link to the parent object.

History locked objects are selectable to use as input and edit properties, but not change geometry. If full locking is needed, children can be selected and locked with Lock command.

The selection filter toolbar flashes if you try to select a object that is filtered out. Trying to drag or otherwise transform an object with history now displays the error message, "Unable to transform X history locked objects" if "Lock children" is selected.


Displays a warning dialog when an action is taken that breaks the link between the output and input objects. To get back, use the Undo command.


The connection between the input objects and the output object is easily broken. The basic rules for preserving history are:

  • Do not purge the history from the child (output) surfaces.
  • Do not delete the parent geometry (input objects - curves, surfaces, etc.) that was used to create the child surface.
  • Do not control-point edit or move the child surface.
  • Do not move parents and children together.
  • Joining objects breaks history on the objects.
  • History stored in previous versions of Rhino may not carry over to a later version.

Turns History recording on/off for dimension commands. Yes is the default value.

Overriding History Options

Command prefixes for turning history on and off

Type these shortcut symbols before a command name to enable/disable history recording

# (hash)

Enables history recording.

For example: #ArcBlend

% (percent)

Disables history recording.

For example: %ArcBlend

Commands with history enabled

Commands with the following notation pay attention to history recording.

 History enabled

These commands can make use of history recording.

Restrictions for blocks

Related commands


Toolbar Menu Status bar


Not on menus.

Record History >

Update Children

The HistoryUpdate command redefines the object based on editing its parents.


Command-line option


Updates all objects.


Toolbar Menu


Not on menus.

The HistoryPurge command removes history from an object and its children.

History records can add to the file size so purging unneeded history may a good idea at times.


HistoryPurge cannot be undone.


See also

Edit objects using history

History Explained - 1/2




Rhinoceros 6 © 2010-2019 Robert McNeel & Associates. 18-Mar-2019