Starting off

Jason Ronallo (North Carolina State University) has an excellent online tutorial at:

http://ronallo.com/iiif-workshop/

Which covers creating a IIIF manifest from scratch, in much more detail.

However, a very useful way to start is to take a simple single, or multiple image manifest, like the examples below, and replace the Image Service URIs, and labels with your own.

Experiment, and test in the Universal Viewer, or Mirador.

There is also a IIIF Presentation API validator, which will validate your work at:

https://iiif.io/api/presentation/validator/service/

A basic single image manifest with an Image Service

{
  "@context": "http://iiif.io/api/presentation/2/context.json",
  "@type": "sc:Manifest",
  "@id": "http://localhost:3000/manifest.json",
  "label": "Something brief but helpful",
  "description": "A longer and more descriptive piece of text.",
  "attribution": "My organisation",
  "logo": "https://iiif.io/img/logo-iiif-34x30.png",
  "sequences": [
    {
      "@type": "sc:Sequence",
      "canvases": [
        {
          "@type": "sc:Canvas",
          "@id": "urn://firstcanvas",
          "label": "Canvas label",
          "width": 6099,
          "height": 8599,
          "images": [
            {
              "@type": "oa:Annotation",
              "motivation": "sc:painting",
              "on": "urn://firstcanvas",
              "resource": {
                "@type": "dctypes:Image",
                "@id": "https://iiif.lib.ncsu.edu/iiif/segPap_022/full/500,/0/default.jpg",

                "service": {
                  "@context":  "http://iiif.io/api/image/2/context.json",
                  "@id": "https://iiif.lib.ncsu.edu/iiif/segPap_022",
                  "profile": "http://iiif.io/api/image/2/level2.json"
                }
              }
            }
          ]
        }
      ]
    }
  ]
}

A good quick way to test your manifest is to use a service like: http://myjson.com/

A simple two canvas manifest with Image Services.

{
    "@context": "http://iiif.io/api/presentation/2/context.json",
    "@type": "sc:Manifest",
    "@id": "http://localhost:3000/manifest.json",
    "label": "Something brief but helpful",
    "description": "A longer and more descriptive piece of text.",
    "attribution": "My organisation",
    "logo": "https://iiif.io/img/logo-iiif-34x30.png",
    "sequences": [{
        "@type": "sc:Sequence",
        "canvases": [{
                "@type": "sc:Canvas",
                "@id": "urn://firstcanvas",
                "label": "Canvas label 1",
                "width": 6099,
                "height": 8599,
                "images": [{
                    "@type": "oa:Annotation",
                    "motivation": "sc:painting",
                    "on": "urn://firstcanvas",
                    "resource": {
                        "@type": "dctypes:Image",
                        "@id": "https://iiif.lib.ncsu.edu/iiif/segPap_022/full/500,/0/default.jpg",

                        "service": {
                            "@context": "http://iiif.io/api/image/2/context.json",
                            "@id": "https://iiif.lib.ncsu.edu/iiif/segPap_022",
                            "profile": "http://iiif.io/api/image/2/level2.json"
                        }
                    }
                }]
            },
            {
                "@type": "sc:Canvas",
                "@id": "urn://secondcanvas",
                "label": "Canvas label 2",
                "width": 6099,
                "height": 8599,
                "images": [{
                    "@type": "oa:Annotation",
                    "motivation": "sc:painting",
                    "on": "urn://firstcanvas",
                    "resource": {
                        "@type": "dctypes:Image",
                        "@id": "https://iiif.lib.ncsu.edu/iiif/segPap_022/full/500,/0/default.jpg",

                        "service": {
                            "@context": "http://iiif.io/api/image/2/context.json",
                            "@id": "https://iiif.lib.ncsu.edu/iiif/segPap_022",
                            "profile": "http://iiif.io/api/image/2/level2.json"
                        }
                    }
                }]
            }
        ]
    }]
}