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# DMForestSetAdaptivityStrategy
Get the strategy for combining adaptivity labels from multiple processes. 
## Synopsis
```
#include "petscdmforest.h" 
#include "petscdm.h" 
#include "petscdmlabel.h" 
PetscErrorCode DMForestGetAdaptivityStrategy(DM dm, DMForestAdaptivityStrategy *adaptStrategy)
```
Not Collective


## Input Parameter

- ***dm -*** the forest



## Output Parameter

- ***adaptStrategy -*** the adaptivity strategy (default `DMFORESTADAPTALL`)





## Note
Subtypes
of `DMFOREST` may define their own strategies.  Two default strategies are `DMFORESTADAPTALL`, which indicates that all
processes must agree for a refinement/coarsening flag to be valid, and `DMFORESTADAPTANY`, which indicates that only
one process needs to specify refinement/coarsening.


## See Also
 `DM`, `DMFOREST`, `DMFORESTADAPTALL`, `DMFORESTADAPTANY`, `DMForestSetAdaptivityStrategy()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/forest/forest.c.html#DMForestSetAdaptivityStrategy">src/dm/impls/forest/forest.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/forest/forest.c)


[Index of all DMForest routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)