Is the "diagram.eraser.show" property specified in that document?
Dear 龚 文益,
thank you for contacting us.
Currently, more information regarding the "diagram.eraser.show" key can be found in the Diagram configuration: https://developer.myscript.com/docs/interactive-ink/1.2/reference/configuration/#diagram
As you can see, by default it is set to true. In case you want to disable it (no longer display a halo), just set the configuration to "false".
Let us know if you have further questions.