CellLabelAutoDelete

CellLabelAutoDelete

is an option for Cell which specifies whether a label for the cell should be automatically deleted if the contents of the cell are modified or the notebook containing the cell is saved in a file.

Details

  • CellLabelAutoDelete->Automatic indicates that labels should only be deleted if the cell is modified. Unmodified cells that are saved to a file will preserve their cell labels.
  • Cell styles that represent Wolfram System input and output typically have CellLabelAutoDelete->True.
  • CellLabelAutoDelete is more often set for styles of cells than for individual cells.

Examples

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Basic Examples  (1)

Create a notebook with the setting CellLabelAutoDelete->True:

When inputs are evaluated, cell labels are attached to the input and output cells:

If you edit a previously evaluated input cell, its cell label is cleared:

When the notebook is saved, cell labels are automatically deleted:

Close the saved notebook:

When the notebook is reopened, no cell labels are present:

Close the notebook again and delete the temporary file:

Scope  (1)

Create a notebook with the setting CellLabelAutoDelete->False:

When inputs are evaluated, cell labels are attached to the input and output cells:

Because CellLabelAutoDelete is turned off, editing an input does not reset its cell label:

Neither does saving and reopening the notebook:

Close the saved notebook:

When the notebook is reopened, the cell labels are still present:

Close the notebook again and delete the temporary file:

Introduced in 1996
 (3.0)
 |
Updated in 2018
 (11.3)