diff --git a/cateditor/src/components/CatalogContents.vue b/cateditor/src/components/CatalogContents.vue
index d036541..28fb835 100644
--- a/cateditor/src/components/CatalogContents.vue
+++ b/cateditor/src/components/CatalogContents.vue
@@ -1,41 +1,308 @@
 <template>
   <v-container fluid grid-list-lg ma-0 pa-1>
+
     <v-layout row fill-height>
+      <v-btn @click="step = 1">Add products</v-btn>
+      <v-btn @click="step = 3">Auto arrange</v-btn>
+    </v-layout>
 
-      <v-flex xs4>
-        <SectionList/>
+    <v-layout row fill-height>
+      <v-flex xs3>
+        <v-card>
+          <v-toolbar dense>
+            <v-toolbar-title>Sections</v-toolbar-title>
+          </v-toolbar>
+
+          <div id="sections" class="list-group">
+            <v-list-tile
+              v-for="item in sections"
+              :key="item.id"
+              class="v-list__tile list-group-item list-item"
+              v-bind:class="{'selected': selected === item}"
+            >
+              <v-list-tile-content class="section-parent">
+                <v-list-tile-title v-html="item.name"></v-list-tile-title>
+                <v-list-tile-sub-title class="section-drop" :section-id="item.id"></v-list-tile-sub-title>
+              </v-list-tile-content>
+
+            </v-list-tile>
+          </div>
+        </v-card>
       </v-flex>
 
-      <v-flex xs4>
-        <ProductFamilyList/>
+      <v-flex xs3>
+        <v-card>
+          <v-toolbar dense>
+            <v-toolbar-title>Models</v-toolbar-title>
+          </v-toolbar>
+
+          <div id="models" class="list-group">
+            <div  v-for="item in selectedModels" :key="item.model" class="v-list__tile list-item">
+              <v-list-tile-title v-html="item.name"></v-list-tile-title>
+            </div>
+          </div>
+        </v-card>
       </v-flex>
 
-      <v-flex xs4>
-        <MaterialList/>
+      <v-flex xs3>
+        <v-card>
+          <v-toolbar dense>
+            <v-toolbar-title>Materials</v-toolbar-title>
+          </v-toolbar>
+
+          <div id="materials" class="list-group">
+            <div
+              v-for="item in selectedMaterials"
+              :key="item.id"
+              class="v-list__tile list-item"
+            >
+              <v-list-tile-title v-html="item.id"></v-list-tile-title>
+            </div>
+          </div>
+        </v-card>
+
+      </v-flex>
+
+      <v-flex xs3>
+        <RawDisplayer :value="selectedMaterials" title="mats" />
       </v-flex>
 
     </v-layout>
+
   </v-container>
 </template>
 
 <script>
-import SectionList from './SectionList'
-import ProductFamilyList from './ProductFamilyList'
-// import ModelList from './ModelList'
-import MaterialList from './MaterialList'
+import Sortable from 'sortablejs'
+import { mapState, mapGetters, mapActions } from 'vuex'
+import arrayMove from 'array-move'
+import RawDisplayer from './RawDisplayer'
+import { paginateModels } from '@/pagination'
 
 export default {
   components: {
-    SectionList,
-    ProductFamilyList,
-    // ModelList,
-    MaterialList,
+    RawDisplayer,
   },
+
   data: () => ({
-  })
+    // NOTE do we need?
+    'placeholderText': 'placeholder',
+    // NOTE do we need?
+    'selected': null,
+  }),
+  computed: {
+    ...mapState([
+      'catalog',
+      'materials',
+    ]),
+    ...mapGetters([
+      'section',
+      'sections',
+      'selectedSection',
+      'selectedModel',
+      'sectionModels',
+      'modelMaterials',
+      'material',
+    ]),
+    selectedModels() {
+      let section = this.selectedSection
+      return this.sectionModels(section)
+    },
+    selectedMaterials() {
+      let model = this.selectedModel
+      return this.modelMaterials(model)
+    },
+  },
+  /*
+     watch: {
+     catalog: function(cat) {
+     console.log('catalog changed')
+     addSectionDrops(this)
+     },
+     },
+   */
+  methods: {
+    reorderModel: function(fromIndex, toIndex) {
+      let models = this.selectedModels
+      arrayMove.mutate(models, fromIndex, toIndex)
+      let pages = paginateModels(models)
+      this.setSectionPages({ section: this.selectedSection, pages: pages })
+    },
+
+    reorderMaterial: function(fromIndex, toIndex) {
+      let mats = this.selectedMaterials
+      arrayMove.mutate(mats, fromIndex, toIndex)
+      this.setModelMaterials({ model: this.selectedModel, materials: mats })
+    },
+    /*
+       groupByModel: function(materials) {
+       let models = []
+
+       for (let mat of materials) {
+       let model = models.length > 0 ? models[models.length - 1] : null
+
+       if (model === null || model.id !== mat.model) {
+       // new model
+       model = { id: mat.model,
+       name: mat.name,
+       materials: [mat.id] }
+       models.push(model)
+       } else {
+       // add to existing
+       model.materials.push(mat.id)
+       }
+       }
+
+       return models
+       },
+     */
+    ...mapActions([
+      'reorderSection',
+      'setSectionPages',
+      'setModelMaterials',
+      'moveModelToSection',
+      'moveMaterialToSection',
+    ]),
+  },
+  mounted: function() {
+    let me = this
+
+    // reordering of sections
+    Sortable.create(document.getElementById('sections'), {
+      group: {
+        name: 'sections',
+      },
+      animation: 150,
+      onEnd: function(evt) {
+        me.reorderSection({ from: evt.oldIndex, to: evt.newIndex })
+      },
+    })
+
+    // reordering of models
+    Sortable.create(document.getElementById('models'), {
+      group: {
+        name: 'models',
+      },
+      animation: 150,
+      onStart: function(evt) {
+        addSectionDrops(me)
+      },
+      onEnd: function(evt) {
+        if (evt.from === evt.to) {
+          me.reorderModel(evt.oldIndex, evt.newIndex)
+        } else {
+          // dropped on a section.
+          let models = me.selectedModels
+          let model = models[evt.oldIndex]
+
+          let sectionID = Number(evt.to.getAttribute('section-id'))
+          let newSection = me.section(sectionID)
+
+          if (me.selectedSection.id !== newSection.id) {
+            me.moveModelToSection({ model: model,
+                                    oldSection: me.selectedSection,
+                                    newSection: newSection })
+          } else {
+            console.log('not moving to same section')
+          }
+        }
+      },
+    })
+
+    // reordering of materials
+    Sortable.create(document.getElementById('materials'), {
+      group: {
+        name: 'materials',
+      },
+      animation: 150,
+      onStart: function(evt) {
+        addSectionDrops(me)
+      },
+      onEnd: function(evt) {
+        if (evt.from === evt.to) {
+          me.reorderMaterial(evt.oldIndex, evt.newIndex)
+        } else {
+          // dropped on a section.
+          let mats = me.selectedMaterials
+          let mat = mats[evt.oldIndex]
+
+          let sectionID = Number(evt.to.getAttribute('section-id'))
+          let newSection = me.section(sectionID)
+
+          if (me.selectedSection.id !== newSection.id) {
+            me.moveMaterialToSection({ material: mat,
+                                       oldModel: me.selectedModel,
+                                       newSection: newSection })
+          } else {
+            console.log('not moving to same section')
+          }
+        }
+      },
+    })
+  },
+}
+
+function addSectionDrops(myvue) {
+  // make sure our section drop targets are set up
+  // after catalog load or section add
+
+  // drop model or material into a section
+  var drops = document.getElementsByClassName('section-drop')
+  for (var i = 0; i < drops.length; ++i) {
+    if (!drops[i].getAttribute('drop-ready')) {
+      drops[i].setAttribute('drop-ready', true)
+
+      Sortable.create(drops[i], {
+        group: {
+          name: 'section-drops',
+          pull: false,
+          put: function(to, from) {
+            // don't allow drop on section where it already lives
+            let oldSectionID = myvue.selectedSection.id
+            let newSectionID = to.el.getAttribute('section-id')
+            if (Number(oldSectionID) === Number(newSectionID)) {
+              return false
+            }
+
+            // allow drop from anything but another section
+            return from.options.group.name !== 'sections'
+          },
+        },
+        animation: 150,
+        // (actual drop is handled in the originating list)
+      })
+    }
+  }
 }
 </script>
 
 <style>
+.selected {
+  background-color: purple;
+}
 
+.sortable-chosen {
+  color: black;
+  background-color: #fddd04;
+}
+
+.sortable-ghost {
+  background-color: #bababa;
+}
+
+.section-parent {
+  position: relative;
+}
+
+.section-drop {
+  position: absolute;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  height: 100%;
+}
+
+.list-item {
+  border-bottom: 1px solid #ddd;
+}
 </style>
diff --git a/cateditor/src/pages/editor/store/index.js b/cateditor/src/pages/editor/store/index.js
index 61c1ea2..a154abb 100644
--- a/cateditor/src/pages/editor/store/index.js
+++ b/cateditor/src/pages/editor/store/index.js
@@ -1,6 +1,8 @@
 import Vue from 'vue'
 import Vuex from 'vuex'
+import arrayMove from 'array-move'
 import axios from 'axios'
+import { paginateModels } from '@/pagination'
 
 Vue.use(Vuex)
 
@@ -82,6 +84,77 @@ export const store = new Vuex.Store({
     savingCatalog: false,
   },
   getters: {
+
+    // NOTE don't use if you're not doing anything interesting, just use state.
+
+    material: (state) => (id) => {
+      return state.materials[id]
+    },
+
+    sections: state => {
+      if (state.catalog != null) {
+        return state.catalog.sections
+      } else {
+        return null
+      }
+    },
+
+    section: (state) => (id) => {
+      if (state.catalog != null) {
+        return state.catalog.sections.find(s => s.id === id)
+      } else {
+        return null
+      }
+    },
+
+    selectedSection: state => {
+      if (state.catalog != null) {
+        return state.catalog.sections[0]
+      } else {
+        return null
+      }
+    },
+
+    selectedModel: state => {
+      if (state.catalog != null) {
+        return state.catalog.sections[0].pages[0][0]
+      } else {
+        return null
+      }
+    },
+
+    sectionModels: (state, getters) => (section) => {
+      // remove pages, return models (blocks) in order
+      let models = []
+      if (section && section.pages) {
+        for (let page of section.pages) {
+          for (let model of page) {
+            if (model.ids && model.ids.length > 0) {
+              // add extra info from a material
+              let material = getters.material(model.ids[0])
+              if (material) {
+                model['name'] = material.name
+                model['model'] = material.model
+                model['family'] = material.family
+              } else {
+                console.log('no material found for id', model.ids[0])
+              }
+              models.push(model)
+            }
+          }
+        }
+      }
+      return models
+    },
+
+    modelMaterials: (state, getters) => (model) => {
+      if (model && model.ids && model.ids.length > 0) {
+        return model.ids.map(id => getters.material(id))
+      }
+      return []
+    },
+
+    /// OLD STUFF
     //
     // catalog info
     //
@@ -95,6 +168,14 @@ export const store = new Vuex.Store({
     //   return state.catalog.sections.find(s => s.id === id)
     // },
 
+    catalogSections: state => {
+      if (state.catalog != null) {
+        return state.catalog.sections
+      } else {
+        return null
+      }
+    },
+
     catalogProperty: (state) => (key) => {
       if (state.catalog != null) {
         return state.catalog[key]
@@ -137,6 +218,23 @@ export const store = new Vuex.Store({
     },
   },
   mutations: {
+    reorderSection(state, { from, to }) {
+      if (from === to) return
+      state.catalog.sections = arrayMove(state.catalog.sections, from, to)
+    },
+
+    setSectionPages(state, { section, pages }) {
+      if (section) {
+        section.pages = pages
+      }
+    },
+
+    setModelMaterials(state, { model, materials }) {
+      if (model) {
+        model.ids = materials.map(m => (typeof m === 'object') ? m.id : m)
+      }
+    },
+
     // SET_CAT_SECTIONS: (state, payload) => {
     //   state.catalog.sections = payload
     // },
@@ -185,6 +283,71 @@ export const store = new Vuex.Store({
 
   },
   actions: {
+    reorderSection({ commit }, payload) {
+      commit('reorderSection', payload)
+    },
+
+    setSectionPages({ commit }, payload) {
+      commit('setSectionPages', payload)
+    },
+
+    setModelMaterials({ commit }, payload) {
+      commit('setModelMaterials', payload)
+    },
+
+    moveModelToSection({ commit, getters }, { model, oldSection, newSection }) {
+      // remove model from old section
+      let oldModels = getters.sectionModels(oldSection)
+      oldModels = oldModels.filter(m => m.model !== model.model)
+      let oldPages = paginateModels(oldModels)
+      commit('setSectionPages', { section: oldSection, pages: oldPages })
+
+      // add model to new section
+      let newModels = getters.sectionModels(newSection)
+      let existingModel = newModels.find(m => m.model === model.model)
+      if (existingModel) {
+        // merge
+        var ids = existingModel.ids
+        ids.push(...model.ids)
+        // uniquify
+        ids = ids.filter((v, i, a) => a.indexOf(v) === i)
+        existingModel.ids = ids
+      } else {
+        // add at end
+        newModels.push(model)
+      }
+      let newPages = paginateModels(newModels)
+      commit('setSectionPages', { section: newSection, pages: newPages })
+    },
+
+    moveMaterialToSection({ commit, getters }, { material, oldModel, newSection }) {
+      // ensure material, not just id
+      if (typeof material === 'string' || typeof material === 'number') {
+        material = getters.material(material)
+      }
+
+      // remove material from old model
+      let mats = oldModel.ids.filter(id => id !== material.id)
+      commit('setModelMaterials', { model: oldModel, materials: mats })
+
+      // add material to new section
+      let newModels = getters.sectionModels(newSection)
+      let existingModel = newModels.find(m => m.model === material.model)
+      if (existingModel) {
+        // merge
+        var ids = existingModel.ids
+        ids.push(material.id)
+        // uniquify
+        ids = ids.filter((v, i, a) => a.indexOf(v) === i)
+        existingModel.ids = ids
+      } else {
+        // add at end
+        newModels.push({ ids: [material.id] })
+      }
+      let newPages = paginateModels(newModels)
+      commit('setSectionPages', { section: newSection, pages: newPages })
+    },
+
     // SET_CAT_SECTIONS: (context, payload) => {
     //   context.commit('SET_CAT_SECTIONS', payload)
     // },
diff --git a/cateditor/src/pagination.js b/cateditor/src/pagination.js
new file mode 100644
index 0000000..784d6c7
--- /dev/null
+++ b/cateditor/src/pagination.js
@@ -0,0 +1,45 @@
+
+export function paginateModels(models) {
+  for (let model of models) {
+    // ensure sizes
+    model.size = modelSize(model)
+  }
+
+  let pages = []
+  let currentSize = 0
+  let currentPage = []
+  for (let model of models) {
+    currentSize += model.size
+    if (currentSize > 3) {
+      pages.push(currentPage)
+      currentPage = [model]
+      currentSize = model.size
+    } else {
+      currentPage.push(model)
+    }
+  }
+  if (currentPage.length > 0) {
+    pages.push(currentPage)
+  }
+
+  return pages
+}
+
+export function modelSize(model) {
+  if (!model || !model.ids) return 0
+  if (model.ids.length <= 4) return 1
+  if (model.ids.length <= 8) return 2
+  return 3
+}
+
+export function sectionModels(section) {
+  // remove pages, return models (blocks) in order
+  let models = []
+  if (section && section.pages) {
+    for (let page of section.pages) {
+      models.push(...page)
+    }
+  }
+
+  return models
+}