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# PetscViewerHDF5SetTimestep
Set the current timestep for the HDF5 output. Fields are stacked in time. 
## Synopsis
```
#include "petscviewerhdf5.h" 
PetscErrorCode PetscViewerHDF5SetTimestep(PetscViewer viewer, PetscInt timestep)
```
Logically Collective


## Input Parameters

- ***viewer -*** the `PetscViewer` of type `PETSCVIEWERHDF5`
- ***timestep -*** The timestep





## Note
This can be called only if the viewer is in timestepping mode. See `PetscViewerHDF5PushTimestepping()` for details.


## See Also
 [](sec_viewers), `PETSCVIEWERHDF5`, `PetscViewerHDF5Open()`, `PetscViewerHDF5PushTimestepping()`, `PetscViewerHDF5IncrementTimestep()`, `PetscViewerHDF5GetTimestep()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/classes/viewer/impls/hdf5/hdf5v.c.html#PetscViewerHDF5SetTimestep">src/sys/classes/viewer/impls/hdf5/hdf5v.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/tutorials/ex19.c.html">src/vec/vec/tutorials/ex19.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/classes/viewer/impls/hdf5/hdf5v.c)


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