Hi @Heidi Weisman ,
You could use following JSON code to format this multi-choice column.
1.Click your column > Column settings > Format this column
2.Advanced mode > type following JSON code
{
"$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
"elmType": "div",
"txtContent": "=join(@currentField, '\n')"
}
My test result:
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