The control string is useless.The control is set to be Textbox with Interactive Image Selector button.
You can set the default data in Data field of the X-Function Bulider.
| Variable Data | Input | Output | Input/Output |
|---|---|---|---|
| <Input> | useless | The variable value will be put out to the Input Image. | It's useless as input and the result will be put out to the active Image. |
| <new> | no use | The result will output to a new Image. | The variable value is usless as input, and the result will output to a new Image. |
You can see the more detailes in Option Strings