Navigation Pattern

Appendix Numbering

A separate appendix numbering format that distinguishes backup slides from the main story.

appendix-numbering

Use Case

Board packets, financial models, and technical decks with substantial backup material.

When to Use

Use when appendix slides are likely to be referenced separately from the main narrative.

When to Avoid

Avoid if the deck has only one or two backup slides; a separate numbering system adds ceremony.

OPF Config Options

Slide numbers: Enabled
Slide number text: A-{{slide.number}}
Date format: Not used
Logo position: Not used
Legal line: Not used
Classification line: Not used
Header content: Appendix
Footer content: Not used
Hide on title slide: Yes

Zone width and inset

The left, center and right zones of design.header and design.footer sit on the content inset: the slide's padding, the same left and right edge as the body, so a footer lines up with the content above it. They are three columns separated by a small gutter (2% of the slide width).

A zone with no content (no image, text, socials or date) lends its column to its neighbours. A lone zone spans the whole content width, so a long source line stays on one line; left and right together share the free centre; a center zone stays centred on the slide and only widens symmetrically. Right-to-left decks mirror the zones.

Zone text that still wraps past two lines is reported by the opf/furniture-wraps validation warning: shorten it, or move sources to a caption or the speaker notes.

Core 0.22.0 behavior.

Best Practices

Start appendix numbering only after a clear appendix divider.

Use a simple prefix such as A-1, A-2, A-3.

Keep appendix labels consistent with the table of contents.

OPF Config

headers-footers:appendix-numbering

OPF JSON

{
  "$schema": "https://openpresentation.org/schema/opf/v1",
  "name": "PPTX.gallery — headers-footers/appendix-numbering",
  "tags": [
    "gallery:headers-footers/appendix-numbering"
  ],
  "design": {
    "header": {
      "left": {
        "text": "Appendix"
      }
    },
    "footer": {
      "right": {
        "text": "A-{{slide.number}}"
      }
    }
  },
  "slides": [
    {
      "id": "gallery-hf-title",
      "layout": "text",
      "title": "Quarterly Operating Review",
      "subtitle": "Header/footer pattern \"appendix-numbering\".",
      "design": {
        "header": false,
        "footer": false
      }
    },
    {
      "id": "gallery-hf-content",
      "layout": "list",
      "title": "Header & footer preview",
      "items": [
        "Repeated furniture stays outside the content grid",
        "Slide numbers renumber in PowerPoint"
      ]
    }
  ],
  "catalogs": {
    "default": {
      "source": "https://www.pptx.gallery",
      "layouts": {
        "text": {
          "name": "Text",
          "summary": "Prose. Several blocks sit side by side when short and stack when long.",
          "tags": [
            "Text"
          ],
          "direction": "column",
          "regions": [
            {
              "name": "title"
            },
            {
              "name": "body",
              "accepts": [
                "text",
                "list",
                "quote",
                "code",
                "group"
              ],
              "role": "primary",
              "flow": "auto"
            }
          ],
          "description": "Explain one idea in continuous prose. Use paragraphs or flowing blocks for detail that needs to be read in sequence.",
          "preview": {
            "vectorSrc": "https://www.pptx.gallery/layout-previews/text.svg"
          }
        },
        "list": {
          "name": "List",
          "summary": "Bulleted or numbered points; one long list flows into columns.",
          "tags": [
            "Text"
          ],
          "direction": "column",
          "regions": [
            {
              "name": "title"
            },
            {
              "name": "body",
              "accepts": [
                "list",
                "text",
                "group"
              ],
              "role": "primary",
              "flow": "auto",
              "listColumns": "auto"
            }
          ],
          "description": "Present several related points in a clear sequence. Use bullets for independent points or numbered items for an ordered list.",
          "preview": {
            "vectorSrc": "https://www.pptx.gallery/layout-previews/list.svg"
          }
        }
      }
    }
  }
}

Open in visual editor Open in Inspector

Load this config in the gallery's visual editor, or in the Inspector at pptx.dev.

Playground deep link: config=headers-footers:appendix-numbering

Appendix Numbering