# vtkBoxRepresentation and related classes
**URL:** https://discourse.vtk.org/t/vtkboxrepresentation-and-related-classes/14086
**Category:** Support
**Created:** [June 19, 2024, 10:43pm UTC](https://discourse.vtk.org/t/vtkboxrepresentation-and-related-classes/14086 "2024-06-19T22:43:43Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@whereismymoney](https://discourse.vtk.org/u/whereismymoney)
#### Post date: [June 19, 2024, 10:43pm UTC](https://discourse.vtk.org/t/vtkboxrepresentation-and-related-classes/14086/1 "2024-06-19T22:43:43Z")
I am studying the VTK textbook and have also searched the internet. In the textbook I don’t see the vtkBoxRepresentation or other representations. Am I missing something? My current problem actually has to do with Scalar Bars, but I thought there would be more information about the vtkBoxRepresentation class. I would like to understand the relationship between the Widget, the Representation, and the Actor.
As I mentioned, my real interest is these three:
vtkScalarBarWidget
vtkScalarBarRepresentation
vtkScalarBarActor
and I would like to resize and reposition the Scalar Bar from within the code, not by having the user use the mouse. I tried SetPosition and related functions for the vtkScalarBarActor but that seems not to work. Should I use SetPosition for the vtkScalarBarWidget? Any help would be appreciated.
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### Author:  [@whereismymoney](https://discourse.vtk.org/u/whereismymoney)
#### Post date: [June 20, 2024, 12:02am UTC](https://discourse.vtk.org/t/vtkboxrepresentation-and-related-classes/14086/2 "2024-06-20T00:02:33Z")
I have resolved my immediate problems by using GetPosition(), SetPosition(), GetPosition2(), SetPosition2() of vtkScalarBarRepresentation.
However I did this by trial-and-error, and I would prefer to have a better understanding of the Actor, Widget and Representation (and why it did not work when I tried this with the vtkScalarBarActor, although the code compiled).