# PetscLayoutSetBlockSize
Sets the block size for a `PetscLayout` object. 
## Synopsis
```
#include "petscis.h" 
PetscErrorCode PetscLayoutSetBlockSize(PetscLayout map, PetscInt bs)
```
Logically Collective


## Input Parameters

- ***map -*** pointer to the map
- ***bs -*** the size





## See Also
 [PetscLayout](sec_matlayout), `PetscLayoutCreate()`, `PetscLayoutSetLocalSize()`, `PetscLayoutGetLocalSize()`, `PetscLayoutGetBlockSize()`,
`PetscLayoutGetRange()`, `PetscLayoutGetRanges()`, `PetscLayoutSetSize()`, `PetscLayoutGetSize()`, `PetscLayoutSetUp()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/utils/pmap.c.html#PetscLayoutSetBlockSize">src/vec/is/utils/pmap.c</A>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/is/utils/pmap.c)


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