Hi there,
I don't see a diagram which you mention. Can you explain a bit more?
Just reading the title of your question:
might something like g_form.showFieldMsg() or g_form.showErrorBox() be what you are looking for?
If my answer helped you in any way, please then mark it as helpful.
Kind regards,
Mark
2020 ServiceNow Community MVP
2020 ServiceNow Developer MVP
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