%RM - Protection of Light Pen Sensitive Fields

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# %RM - Protection of Light Pen Sensitive Fields

`%RM`

This command causes all light pen sensitive fields on the screen to be made write-protected, that is, the user can select them with a light pen, but not overwrite their contents. To switch the write-protection off again, issue the command again.

For a field to be light pen sensitive, it must be displayed intensified (session parameter `AD=I`) or blinking (`AD=B`), and the first character in the field must be one of the light pen designator characters ("?", ">" ,"&" or a blank); selecting a field with a light pen causes the designator character to be changed, therefore you can make the processing of fields selected with a light pen dependent on the values of the designator characters.

See also Light Pen Support (in the Operations documentation) and the `PEN` value of the system variable `*PF-KEY`.