Hi Scott, I've read the thread, and am noticing a slight change of what you're asking for. (1) Initially, you said, I think, that you want to populate an InDesign file from a .csv. With nested styles, you could make the £ sign smaller in the interactive fields, in InDesign. But the smaller font will not export to interactive PDF. All the text will be the same size once exported to PDF. (2) Then, more recently, you said that you want the stores to fill the prices themselves, so, not a CSV? Anyway, if (1) is what you want, native InDesign won't help, because it can't export different sizes of text in a single field (AKA "rich text"). Nor is it possible to create some sort of anchored object that will adjust its position based on the length of the field. However, my (not free) InDesign add-on FormMaker (https://www.id-extras.com/products/formmaker/) would help, because when you use it to export from InDesign to interactive PDF, it will recognize the existence of different font sizes in a single field, and create appropriate rich text fields in Acrobat, so the £ size in the final PDF will be whatever you make it in InDesign. So, with FormMaker, you could just run your datamerge, export to interactive PDF, and no further adjustments would be necessary. If (2) is what you want, you could do the same as (1), possible using placeholder prices £000 (with the £ smaller), and then let the shops carefully modify the price by typing over 000 without touching the £ sign. And if you wanted a more foolproof method, you could even add a format script (in InDesign with FormMaker) to automatically add the smaller £ sign to the field. That would be a bit more complicated, perhaps.
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