History toolbar
![Toolbar: History | Main | Main2 | Tools](../image/command_icons/history.png)
History
Store the connection between a command's input geometry and the result, so that when the input geometry changes, the result updates accordingly.
![Toolbar: History](../image/command_icons/history_lock.png)
History, Lock=Yes
Lock objects with history.
![Toolbar: History](../image/command_icons/history_lock_no_rt.png)
History, Lock=No
Unlock objects with history.
![Toolbar: History](../image/command_icons/historypurge.png)
HistoryPurge
Remove history from an object and its children.
![Toolbar: History](../image/command_icons/history_record.png)
History, Record Yes
Record the state of input objects and update output objects when input objects change.
![Toolbar: History](../image/command_icons/stop history recording.png)
History, Record No
Stop history recording.
![Toolbar: History](../image/command_icons/historyupdate.png)
HistoryUpdate
Redefine selected objects when parents are changed.
![Toolbar: History](../image/command_icons/historyupdate_all_rt.png)
HistoryUpdate, All
Redefine all objects when their parents are changed.
![Toolbar: History | Select History](../image/command_icons/selchildren.png)
SelChildren
Select children of specified parents.
![Toolbar: History | Select | Select History](../image/command_icons/selobjectswithhistory.png)
SelObjectsWithHistory
Select objects that have history.
![Toolbar: History | Select History](../image/command_icons/selparents.png)
SelParents
Select parents of specified children.