diff --git a/build/build.ts b/build/build.ts
index 23ccf12..c172311 100644
--- a/build/build.ts
+++ b/build/build.ts
@@ -52,7 +52,8 @@ const externals = [
   "mithril",
   "parsimmon",
   "codemirror",
-  "codemirror/mode/javascript/javascript"
+  "codemirror/mode/javascript/javascript",
+  "codemirror/mode/yaml/yaml"
 ];
 
 function rmDirSync(dirPath): void {
diff --git a/lib/local-cache.ts b/lib/local-cache.ts
index 7c1c701..cf04d49 100644
--- a/lib/local-cache.ts
+++ b/lib/local-cache.ts
@@ -363,26 +363,42 @@ function refresh(callback): void {
 
             conf.sort((a, b) => (a.id > b.id ? 1 : a.id < b.id ? -1 : 0));
 
+            const ui = {
+              filters: {},
+              device: {},
+              index: {},
+              overview: { charts: {}, groups: {} }
+            };
             const _config = {};
 
             for (const c of conf) {
+              // Evaluate expressions to simplify them
+              const val = expression.evaluate(c.value);
+              _config[c.id] = val;
               if (c.id.startsWith("ui.")) {
                 const keys = c.id.split(".");
-                let ref = _config;
+                // remove the first key(ui)
+                keys.shift();
+                let ref = ui;
                 while (keys.length > 1) {
                   const k = keys.shift();
                   if (typeof ref[k] !== "object") ref[k] = {};
                   ref = ref[k];
                 }
-                // Evaluate expressions to simplify them
-                ref[keys[0]] = expression.evaluate(c.value);
-              } else {
-                // Evaluate expressions to simplify them
-                _config[c.id] = expression.evaluate(c.value);
+                ref[keys[0]] = val;
               }
             }
 
-            resolve(_config);
+            if (!Object.keys(ui["index"]).length) {
+              ui["index"] = {
+                "0": {
+                  label: "ID",
+                  parameter: ["PARAM", "DeviceID.ID"]
+                }
+              };
+            }
+
+            resolve([_config, ui]);
           });
         })
       );
@@ -396,7 +412,8 @@ function refresh(callback): void {
             files: res[3],
             permissions: res[4],
             users: res[5],
-            config: res[6]
+            config: res[6][0],
+            ui: res[6][1]
           };
 
           if (currentSnapshot) {
@@ -536,5 +553,5 @@ export function getUiConfig(snapshotKey): {} {
   const snapshot = snapshots.get(snapshotKey);
   if (!snapshot) throw new Error("Cache snapshot does not exist");
 
-  return snapshot.config.ui;
+  return snapshot.ui;
 }
diff --git a/ui/code-editor-component.ts b/ui/code-editor-component.ts
new file mode 100644
index 0000000..0eeadee
--- /dev/null
+++ b/ui/code-editor-component.ts
@@ -0,0 +1,42 @@
+import { ClosureComponent, Component } from "mithril";
+import { m } from "./components";
+import { codeMirror } from "./dynamic-loader";
+
+const component: ClosureComponent = (): Component => {
+  return {
+    view: vnode => {
+      return m("textarea", {
+        name: vnode.attrs["id"],
+        value: vnode.attrs["value"],
+        oncreate: _vnode => {
+          const editor = codeMirror.fromTextArea(_vnode.dom, {
+            mode: vnode.attrs["mode"],
+            lineNumbers: true,
+            readOnly: vnode.attrs["readOnly"],
+            extraKeys: {
+              "Ctrl-Enter": () => {
+                if (vnode.attrs["onSubmit"])
+                  vnode.attrs["onSubmit"](_vnode.dom);
+              },
+              "Cmd-Enter": () => {
+                if (vnode.attrs["onSubmit"])
+                  vnode.attrs["onSubmit"](_vnode.dom);
+              }
+            }
+          });
+
+          if (vnode.attrs["onChange"]) {
+            editor.on("change", e => {
+              vnode.attrs["onChange"](e.getValue());
+            });
+          }
+
+          if (vnode.attrs["focus"]) editor.focus();
+          if (vnode.attrs["onReady"]) vnode.attrs["onReady"](editor);
+        }
+      });
+    }
+  };
+};
+
+export default component;
diff --git a/ui/components/overview-dot.ts b/ui/components/overview-dot.ts
index 4353d31..0dda69a 100644
--- a/ui/components/overview-dot.ts
+++ b/ui/components/overview-dot.ts
@@ -10,6 +10,7 @@ const component: ClosureComponent = (): Component => {
     view: vnode => {
       const device = vnode.attrs["device"];
       const chart = CHARTS[vnode.attrs["chart"]];
+      if (!chart) return null;
       for (const slice of Object.values(chart.slices)) {
         const filter = slice["filter"];
         if (store.evaluateExpression(filter, device)) {
diff --git a/ui/config-functions.ts b/ui/config-functions.ts
new file mode 100644
index 0000000..154fe5e
--- /dev/null
+++ b/ui/config-functions.ts
@@ -0,0 +1,92 @@
+interface Config {
+  _id: string;
+  value: string;
+}
+
+interface Diff {
+  add: Config[];
+  remove: string[];
+}
+
+export function flattenConfig(config): any {
+  const flatten = {};
+  const recuresive = (obj: any, root: string): void => {
+    for (const [k, v] of Object.entries(obj)) {
+      const key = root ? `${root}.${k}` : k;
+      if (v === undefined) continue;
+      if (v === null || typeof v !== "object") flatten[key] = v;
+      else recuresive(v, key);
+    }
+  };
+
+  if (config !== null && typeof config === "object") recuresive(config, "");
+  return flatten;
+}
+
+export function structureConfig(config: Config[]): any {
+  config.sort((a, b) => (a._id > b._id ? 1 : a._id < b._id ? -1 : 0));
+  const _config = {};
+  for (const c of config) {
+    const keys = c._id.split(".");
+    let ref = _config;
+    while (keys.length > 1) {
+      const k = keys.shift();
+      if (typeof ref[k] !== "object") ref[k] = {};
+      ref = ref[k];
+    }
+    ref[keys[0]] = c.value;
+  }
+
+  const toArray = function(object): any {
+    const MAX_BITS = 30;
+    const MAX_ARRAY_SIZE = MAX_BITS * 10;
+
+    if (object == null || typeof object !== "object") return object;
+
+    if (Object.keys(object).length <= MAX_ARRAY_SIZE) {
+      let indexes = [];
+      for (const key of Object.keys(object)) {
+        const idx = Math.floor(+key);
+        if (idx >= 0 && idx < MAX_ARRAY_SIZE && String(idx) === key) {
+          const pos = Math.floor(idx / MAX_BITS);
+          if (!indexes[pos]) indexes[pos] = 0;
+          indexes[pos] |= 1 << idx % MAX_BITS;
+        } else {
+          indexes = [];
+          break;
+        }
+      }
+
+      let index = 0;
+      while (indexes.length && (index = indexes.shift()) === 1073741823);
+
+      if (index && (~index & (index + 1)) === index + 1) {
+        // its an array
+        const array = [];
+        for (let i = 0; i < Object.keys(object).length; i++)
+          array[i] = object[i];
+
+        object = array;
+      }
+    }
+
+    for (const [k, v] of Object.entries(object)) object[k] = toArray(v);
+    return object;
+  };
+
+  return toArray(_config);
+}
+
+export function diffConfig(current, target): Diff {
+  const diff = {
+    add: [],
+    remove: []
+  };
+
+  for (const [k, v] of Object.entries(target))
+    if (!current[k] || current[k] !== v) diff.add.push({ _id: k, value: v });
+
+  for (const k of Object.keys(current)) if (!target[k]) diff.remove.push(k);
+
+  return diff;
+}
diff --git a/ui/config-page.ts b/ui/config-page.ts
index 1c2e466..a88ed18 100644
--- a/ui/config-page.ts
+++ b/ui/config-page.ts
@@ -2,9 +2,10 @@ import { m } from "./components";
 import * as store from "./store";
 import * as notifications from "./notifications";
 import putFormComponent from "./put-form-component";
+import uiConfigComponent from "./ui-config-component";
 import * as overlay from "./overlay";
 import * as expressionParser from "../lib/common/expression-parser";
-import { loadCodeMirror } from "./dynamic-loader";
+import { loadCodeMirror, loadYaml } from "./dynamic-loader";
 import { ClosureComponent, Component, Children } from "mithril";
 
 const attributes = [
@@ -92,7 +93,7 @@ export function init(): Promise<{}> {
     );
   }
   return new Promise((resolve, reject) => {
-    loadCodeMirror()
+    Promise.all([loadCodeMirror(), loadYaml()])
       .then(() => {
         resolve({});
       })
@@ -209,7 +210,11 @@ export const component: ClosureComponent = (): Component => {
         }
       });
 
+      const confs = store.fetch("config", true);
+
       let newConfig;
+      const subs = [];
+
       if (window.authorizer.hasAccess("config", 3)) {
         newConfig = m(
           "button.primary",
@@ -250,11 +255,75 @@ export const component: ClosureComponent = (): Component => {
               overlay.open(cb);
             }
           },
-          "New"
+          "New config"
         );
-      }
 
-      const confs = store.fetch("config", true);
+        const subsData = [
+          { name: "overview", prefix: "ui.overview.groups.", data: [] },
+          { name: "charts", prefix: "ui.overview.charts.", data: [] },
+          { name: "filters", prefix: "ui.filters.", data: [] },
+          { name: "index page", prefix: "ui.index.", data: [] },
+          { name: "device page", prefix: "ui.device.", data: [] }
+        ];
+
+        if (confs.fulfilled) {
+          for (const conf of confs.value) {
+            for (const sub of subsData) {
+              if (conf["_id"].startsWith(sub["prefix"])) {
+                sub["data"].push(conf);
+                break;
+              }
+            }
+          }
+        }
+
+        for (const sub of subsData) {
+          const attrs = { prefix: sub.prefix, name: sub.name, data: sub.data };
+          subs.push(
+            m(
+              "button",
+              {
+                onclick: () => {
+                  const cb = (): Children => {
+                    return m(
+                      uiConfigComponent,
+                      Object.assign(
+                        {
+                          onUpdate: errs => {
+                            const errors = errs ? Object.values(errs) : [];
+                            if (errors.length) {
+                              for (const err of errors)
+                                notifications.push("error", err);
+                            } else {
+                              notifications.push(
+                                "success",
+                                `${sub.name.replace(
+                                  /^[a-z]/,
+                                  sub.name[0].toUpperCase()
+                                )} config updated`
+                              );
+                              overlay.close(cb);
+                            }
+                            store.fulfill(0, Date.now());
+                          },
+                          onError: err => {
+                            notifications.push("error", err.message);
+                            store.fulfill(0, Date.now());
+                            overlay.close(cb);
+                          }
+                        },
+                        attrs
+                      )
+                    );
+                  };
+                  overlay.open(cb);
+                }
+              },
+              `Edit ${sub.name}`
+            )
+          );
+        }
+      }
 
       return [
         m("h1", "Listing config"),
@@ -266,7 +335,7 @@ export const component: ClosureComponent = (): Component => {
             { style: "height: 400px" },
             renderTable(confs, vnode.state["searchString"])
           ),
-          m(".actions-bar", newConfig)
+          m(".actions-bar", [newConfig].concat(subs))
         )
       ];
     }
diff --git a/ui/dynamic-loader.ts b/ui/dynamic-loader.ts
index 5fb0db3..ef1af42 100644
--- a/ui/dynamic-loader.ts
+++ b/ui/dynamic-loader.ts
@@ -7,7 +7,8 @@ export function loadCodeMirror(): Promise<void> {
   return new Promise((resolve, reject) => {
     const promises = [
       import(/* webpackChunkName: "codemirror" */ "codemirror"),
-      import(/* webpackChunkName: "codemirror" */ "codemirror/mode/javascript/javascript")
+      import(/* webpackChunkName: "codemirror" */ "codemirror/mode/javascript/javascript"),
+      import(/* webpackChunkName: "codemirror" */ "codemirror/mode/yaml/yaml")
     ];
     Promise.all(promises)
       .then(modules => {
diff --git a/ui/put-form-component.ts b/ui/put-form-component.ts
index 4b0b09a..09fce37 100644
--- a/ui/put-form-component.ts
+++ b/ui/put-form-component.ts
@@ -1,6 +1,6 @@
 import { VnodeDOM, ClosureComponent, Component, Children } from "mithril";
 import { m } from "./components";
-import { codeMirror } from "./dynamic-loader";
+import codeEditorComponent from "./code-editor-component";
 
 const singular = {
   presets: "preset",
@@ -59,34 +59,18 @@ function createField(current, attr, focus): Children {
 
     return m("table", options);
   } else if (attr.type === "code") {
-    return m("textarea", {
-      name: attr.id,
+    const attrs = {
+      id: attr.id,
       value: current.object[attr.id],
-      oncreate: _vnode => {
-        const editor = codeMirror.fromTextArea(_vnode.dom, {
-          mode: "javascript",
-          lineNumbers: true,
-          extraKeys: {
-            "Ctrl-Enter": () => {
-              ((_vnode.dom as HTMLTextAreaElement).form.querySelector(
-                "button[type=submit]"
-              ) as HTMLButtonElement).click();
-            },
-            "Cmd-Enter": () => {
-              ((_vnode.dom as HTMLTextAreaElement).form.querySelector(
-                "button[type=submit]"
-              ) as HTMLButtonElement).click();
-            }
-          }
-        });
-
-        editor.on("change", e => {
-          current.object[attr.id] = e.getValue();
-        });
-
-        if (focus) editor.focus();
+      mode: "javascript",
+      onSubmit: dom => {
+        dom.form.querySelector("button[type=submit]").click();
+      },
+      onChange: value => {
+        current.object[attr.id] = value;
       }
-    });
+    };
+    return m(codeEditorComponent, attrs);
   } else if (attr.type === "file") {
     return m("input", {
       type: "file",
diff --git a/ui/store.ts b/ui/store.ts
index 3988670..c65ab78 100644
--- a/ui/store.ts
+++ b/ui/store.ts
@@ -520,6 +520,15 @@ export function putResource(resourceType, id, object): Promise<void> {
   });
 }
 
+export function queryConfig(pattern = "%"): Promise<any[]> {
+  const filter = stringify(["LIKE", ["PARAM", "_id"], pattern]);
+  return m.request({
+    method: "GET",
+    url: `api/config/?${m.buildQueryString({ filter: filter })}`,
+    background: true
+  });
+}
+
 export function resourceExists(resource, id): Promise<number> {
   const param = resource === "devices" ? "DeviceID.ID" : "_id";
   const filter = ["=", ["PARAM", param], id];
diff --git a/ui/ui-config-component.ts b/ui/ui-config-component.ts
new file mode 100644
index 0000000..063af6d
--- /dev/null
+++ b/ui/ui-config-component.ts
@@ -0,0 +1,126 @@
+import { ClosureComponent, Component } from "mithril";
+import { m } from "./components";
+import * as store from "./store";
+import { yaml } from "./dynamic-loader";
+import * as configFunctions from "./config-functions";
+import codeEditorComponent from "./code-editor-component";
+import { parse } from "../lib/common/expression-parser";
+
+function putActionHandler(prefix: string[], dataYaml: string): Promise<any> {
+  return new Promise((resolve, reject) => {
+    try {
+      let updated = yaml.parse(dataYaml, { schema: "failsafe" });
+      if (updated) {
+        const config = {};
+        let ref = config;
+        prefix.forEach((seg, index) => {
+          if (index < prefix.length - 1) {
+            ref[seg] = {};
+            ref = ref[seg];
+          } else {
+            ref[seg] = updated;
+          }
+        });
+        updated = configFunctions.flattenConfig(config);
+      } else {
+        updated = {};
+      }
+
+      // Try parse to ensure valid expressions
+      for (const v of Object.values(updated)) parse(v);
+
+      store
+        .queryConfig(`${prefix.join(".")}.%`)
+        .then(res => {
+          const current = {};
+          for (const f of res) current[f._id] = f.value;
+
+          const diff = configFunctions.diffConfig(current, updated);
+          if (!diff.add.length && !diff.remove.length) return void resolve();
+
+          const promises = [];
+
+          for (const obj of diff.add)
+            promises.push(store.putResource("config", obj._id, obj));
+
+          for (const id of diff.remove)
+            promises.push(store.deleteResource("config", id));
+
+          Promise.all(promises)
+            .then(() => {
+              resolve();
+            })
+            .catch(reject);
+        })
+        .catch(reject);
+    } catch (error) {
+      resolve({ config: error.message });
+    }
+  });
+}
+
+const component: ClosureComponent = (): Component => {
+  return {
+    view: vnode => {
+      const prefix = vnode.attrs["prefix"].split(".");
+      const name = vnode.attrs["name"];
+      const data = vnode.attrs["data"];
+
+      if (prefix[prefix.length - 1] === "") prefix.pop();
+
+      let config;
+      if (data.length) {
+        config = configFunctions.structureConfig(data);
+        for (const seg of prefix) config = config[seg];
+      }
+
+      const yamlString =
+        config && Object.values(config).length
+          ? yaml.stringify(config, {
+              schema: "failsafe",
+              tags: args => {
+                return args;
+              }
+            })
+          : "";
+
+      const attrs = {
+        id: `${name}-ui-config`,
+        value: yamlString,
+        mode: "yaml",
+        focus: true,
+        onSubmit: dom => {
+          dom.form.querySelector("button[type=submit]").click();
+        },
+        onChange: value => {
+          vnode.state["updatedYaml"] = value;
+        }
+      };
+
+      const code = m(codeEditorComponent, attrs);
+      const submit = m("button.primary", { type: "submit" }, "Save");
+
+      return m("div.put-form", [
+        m("h1", `Editing ${name}`),
+        m(
+          "form",
+          {
+            onsubmit: e => {
+              e.redraw = false;
+              e.preventDefault();
+              if (vnode.state["updatedYaml"] == null)
+                vnode.state["updatedYaml"] = yamlString;
+
+              putActionHandler(prefix, vnode.state["updatedYaml"])
+                .then(vnode.attrs["onUpdate"])
+                .catch(vnode.attrs["onError"]);
+            }
+          },
+          [code, m(".actions-bar", [submit])]
+        )
+      ]);
+    }
+  };
+};
+
+export default component;