Related:
See also [Feature] Custom placeholder text and images in designOption.json (https://captivate.uservoice.com/forums/939318-adobe-captivate/suggestions/50456811--feature-custom-placeholder-text-and-images-in-d)

Problem:
Currently, designOption.json supports neither placeholder text nor placeholder images. See related suggestion: https://captivate.uservoice.com/forums/939318-adobe-captivate/suggestions/50456811--feature-custom-placeholder-text-and-images-in-d

Suggestion:
Allow Captivate variables to be referenced in designOption.json. This would enable dynamic values such as author names, project titles, copyright notices, or other metadata to be automatically inserted into text fields.

Example:
json
{
"tag": "slide-item-body",
"placeholder": "© $$Project.Copyright$$ — $$Date.Year$$",
"customStyles": {
"all": {}
}
}