:orphan:
# DMCopyLabels
Copy labels from one `DM` mesh to another `DM` with a superset of the points
## Synopsis
```
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMCopyLabels(DM dmA, DM dmB, PetscCopyMode mode, PetscBool all, DMCopyLabelsMode emode)
```
Collective
## Input Parameters
- ***dmA -*** The `DM` object with initial labels
- ***dmB -*** The `DM` object to which labels are copied
- ***mode -*** Copy labels by pointers (`PETSC_OWN_POINTER`) or duplicate them (`PETSC_COPY_VALUES`)
- ***all -*** Copy all labels including "depth", "dim", and "celltype" (`PETSC_TRUE`) which are otherwise ignored (`PETSC_FALSE`)
- ***emode -*** How to behave when a `DMLabel` in the source and destination `DM`s with the same name is encountered (see `DMCopyLabelsMode`)
## Note
This is typically used when interpolating or otherwise adding to a mesh, or testing.
## See Also
[](ch_dmbase), `DM`, `DMLabel`, `DMAddLabel()`, `DMCopyLabelsMode`
## Level
intermediate
## Location
src/dm/interface/dm.c
## Examples
src/dm/label/tutorials/ex1.c
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