skip letter 'I' in numbering

Gosh, I can think of so many reasons for avoiding this, including accuracy of referencing.

What's the reason for creating your own custom alphabet that's missing characters?

Can you instead display numbers or use a serif font to avoid confusion?

It's likely of no use to you at all, esp. in Structured, but FM does ‘know’ how to implement arbitrary numbering, because it's supported in
Format🞃Document>Numbering…/Footnote Numbering\
[Custom]
Pattern: ABCDEFGHJKLMNOPQRSTUVWXYZ

These can then be cross-referenced by $paranum or $paranumonly. But it's all a bit of a hack, usually requiring book meta-content not published, and resulting in hypertext that goes nowhere.

It can be handy for fixed-range numbering using arbitrary Unicode character sequences, such as:
❶❷❸❹❺❻❼❽❾❿⓫⓬⓭⓮⓯⓰⓱⓲⓳⓴
Fixed? Yeah, the rollover after ⓴ here would be to ❶❶, and not to ❷❶. There's no way to get it to usefully pick up the ⓿ either.

If your FrameMaker document is part of a book, always set the numbering at the book level. Select the component in the book, right-click on it, and choose Numbering. You can either choose a value, or you can Continue Numbering from Previous Chapter in Book.

For your situation, you can select the component that would normally number as "I" and use the Numbering dialog box to change it to something else. If you need help with this, contact me offlist and we can do a quick meeting. rick at frameexpert dot com

Hi Vicki,

I do not know your structured application which can do all sorts of things via the EDD.

What I can tell:

Yes, FrameMaker uses <A+> in paragraph numbering ( test this in a (non-structured?) file: open the Paragraph Designer and go to the Numbering tab; activate Numbering and enter <A+> in the Format text box), and for each paragraph of this paragraph format the numbering counts up (ABCD, etc.).

FM will not skip I (I guess you mean the upper case i, don't you?). You cannot enter your own set of numbering characters.

A (manual) solution would be to insert an otherwise empty paragraph format (e.g. body) with <I> as numbering. Apply white color, 2 pt to this empty paragraph with the I numbering. Then it would be almost invisible.

The following paragraph with your numbering would continue with J.

Of course you can write an ExtendScript script to automate this.

Best regards, Winfried