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# PetscDrawGetViewPort
Gets the portion of the window (page) to which draw routines will write. 
## Synopsis
```
#include "petscdraw.h" 
PetscErrorCode PetscDrawGetViewPort(PetscDraw draw, PetscReal *xl, PetscReal *yl, PetscReal *xr, PetscReal *yr)
```
Collective


## Input Parameter

- ***draw -*** the drawing context



## Output Parameters

- ***xl -*** the horizontal coordinate of the lower left corner of the subwindow.
- ***yl -*** the vertical coordinate of the lower left corner of the subwindow.
- ***xr -*** the horizontal coordinate of the upper right corner of the subwindow.
- ***yr -*** the vertical coordinate of the upper right corner of the subwindow.





## Notes
These numbers must always be between 0.0 and 1.0.

Lower left corner is (0,0).


## See Also
 `PetscDraw`, `PetscDrawSplitViewPort()`, `PetscDrawSetViewPort()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/classes/draw/interface/dviewp.c.html#PetscDrawGetViewPort">src/sys/classes/draw/interface/dviewp.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/classes/draw/interface/dviewp.c)


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