If you’re applying paragraph rules in Adobe InDesign but they aren’t visible, check the following in the Paragraph Rules dialog box (or the Paragraph Rules pane of the Paragraph Style Options dialog box if you’re editing a style):

• Make sure Rule On is enabled.
• If Weight is set to 0, increase the stroke weight.
• If Color is set to None, give it an actual color.
• Check the Width, Offset, Left Indent, and Right Indent. If any of these values is too high, it can push the rule outside the text frame where you can’t see it.

Last time this happened to me, it was because I had built a style on top of another style that had a large rule indent. I set the indent to 0 and the rule became visible inside the text frame.