Adjusting leading in form fields

[PrintingServices]

I have a client whose fillable form mimics a sheet of lined foolscap. I need to set the leading so that each time someone hits Return or fills a line with text, the next line of text lines up on the ruled blue line of the 'foolscap'. Don't know how to do this. And of course, I don't want the person filling in the form to be able to alter this. Any suggestions?

[try67]

You can add spaces to the start of a new line (using a script), but it won't work if the user fills in text and it wraps down to the next line, without them pressing Enter.

[PrintingServices]

Thanks, no good for this client. Surprising how limited the Forms tools are for AcrobatPro; it really needs some InDesign level formatting options.

[try67]

Just to clarify, it is possible to set it (using Rich Text Formatting), but not as a "sticky" setting of the field. If you clear the text in it, it will disappear.