# PetscViewerASCIIUseTabs
Turns on or off the use of tabs with the ASCII `PetscViewer` 
## Synopsis
```
#include "petscviewer.h" 
PetscErrorCode PetscViewerASCIIUseTabs(PetscViewer viewer, PetscBool flg)
```
Not Collective, but only first processor in set has any effect


## Input Parameters

- ***viewer -*** obtained with `PetscViewerASCIIOpen()`
- ***flg -*** `PETSC_TRUE` or `PETSC_FALSE`





## Fortran Note
This routine is not supported in Fortran.


## See Also
 `PetscPrintf()`, `PetscSynchronizedPrintf()`, `PetscViewerASCIIPrintf()`,
`PetscViewerASCIIPopTab()`, `PetscViewerASCIISynchronizedPrintf()`, `PetscViewerASCIIPushTab()`, `PetscViewerASCIIOpen()`,
`PetscViewerCreate()`, `PetscViewerDestroy()`, `PetscViewerSetType()`, `PetscViewerASCIIGetPointer()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/classes/viewer/impls/ascii/filev.c.html#PetscViewerASCIIUseTabs">src/sys/classes/viewer/impls/ascii/filev.c</A>


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


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