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# PetscOptionsView
Prints the options that have been loaded. This is useful for debugging purposes.
## Synopsis
```
#include "petscsys.h"
PetscErrorCode PetscOptionsView(PetscOptions options, PetscViewer viewer)
```
Logically Collective
## Input Parameters
- ***options -*** options database, use `NULL` for default global database
- ***viewer -*** must be an `PETSCVIEWERASCII` viewer
## Options Database Key
- ***-options_view -*** Activates `PetscOptionsView()` within `PetscFinalize()`
## Note
Only the MPI rank 0 of the `MPI_Comm` used to create view prints the option values. Other processes
may have different values but they are not printed.
## See Also
`PetscOptionsAllUsed()`
## Level
advanced
## Location
src/sys/objects/options.c
## Examples
src/sys/tutorials/ex19.c
---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/objects/options.c)
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