# vtk How to dynamic input character?

**URL:** https://discourse.vtk.org/t/vtk-how-to-dynamic-input-character/8684
**Category:** Support
**Tags:** proposal
**Created:** [June 9, 2022, 2:55am UTC](https://discourse.vtk.org/t/vtk-how-to-dynamic-input-character/8684 "2022-06-09T02:55:05Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![wulicheng](https://discourse.vtk.org/user_avatar/discourse.vtk.org/wulicheng/32/1990_2.png) [@wulicheng](https://discourse.vtk.org/u/wulicheng)
#### Post date: [June 9, 2022, 2:55am UTC](https://discourse.vtk.org/t/vtk-how-to-dynamic-input-character/8684/1 "2022-06-09T02:55:05Z")

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like the title, I want to input some annotation on the slicer of the vtkImageData. But I do not know how to do?