diff --git a/README.md b/README.md
index 5987f8b..e053966 100644
--- a/README.md
+++ b/README.md
@@ -10,8 +10,9 @@ Data source from : https://github.com/pomber/covid19
 
 ## Features : 
 
+- Maths functions : Exp, pow, Logistic
 - sync X axis at a value
-- reset (broken, need reload page too)
+- reset 
 - set a limit for y axis
 - select first and last day
 - select data source (confirmed, deaths, recovered)
diff --git a/brain.md b/brain.md
index 5f00766..51f8173 100644
--- a/brain.md
+++ b/brain.md
@@ -3,14 +3,7 @@
 
 ## First production : 
 
-OK  load data source
-OK git clean
-vuejs prod
-hosting
-
-
-Save user config to local
-reset mode 
+User Local Presets (N)
 
 Charts modes:
 - Country day decal
diff --git a/doc.md b/doc.md
index 51cd3b1..f7122a5 100644
--- a/doc.md
+++ b/doc.md
@@ -3,6 +3,8 @@
 
 # Changelog 
 
+v0.04 Fix reset
+v0.03 maths functions
 v0.02 sync x axis
 v0.01 repack, data auto loading
 
diff --git a/src/App.vue b/src/App.vue
index 02f4c7e..ec9b7d7 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -125,7 +125,7 @@
             },
         },
         countriesConfig: {
-            selected: [{name: "France"}, {name: "Italy"}],
+            selected: [{name: "France"}, {name: "Italy"},{name:"Spain"},{name:"United Kingdom"}],
             basePalette: "tolRainbowColor"
         },
     }
@@ -137,13 +137,13 @@
         props: {
             source: String,
         },
-        data: () => ({
+        data () { return {
             drawer: true,
             title: 'Cov Charts',
             allData: {},
             chartWidth: 500,
-            chartConfig: defaultUserConfig.chartConfig,
-            countriesConfig: defaultUserConfig.countriesConfig,
+            chartConfig: Object.assign({},defaultUserConfig.chartConfig),
+            countriesConfig:Object.assign({}, defaultUserConfig.countriesConfig),
             configLists: {
                 scaleList: ['log', 'linear'],
                 typesList: ['confirmed', 'deaths', 'recovered'],
@@ -154,7 +154,7 @@
                 //all: Object.keys(AllData).sort(),
             },
             debug: false,
-        }),
+        }},
         watch: {
             drawer() {
                 console.log('dd', this.drawer)
@@ -189,25 +189,21 @@
                     uc = JSON.parse(uc)
                     this.countriesConfig = uc.countriesConfig
                     this.chartConfig = uc.chartConfig
-                    this.ccc("loadConfig storage")
                 } else {
-                    this.countriesConfig = defaultUserConfig.countriesConfig
-                    this.chartConfig = defaultUserConfig.chartConfig
-                    this.ccc("loadConfig default")
+                    this.countriesConfig = Object.assign({},defaultUserConfig.countriesConfig)
+                    this.chartConfig = Object.assign({},defaultUserConfig.chartConfig)
                 }
             },
             saveConfig() {
-                this.ccc("saveConfig")
                 let userConfig = {countriesConfig: this.countriesConfig, chartConfig: this.chartConfig}
                 localStorage.setItem('userConfig', JSON.stringify(userConfig))
             },
             resetConfig() {
                 localStorage.setItem('userConfig', 'null')
-                this.ccc("resetConfig")
                 this.loadConfig()
             },
             ccc(a, b) {
-                if (this.debug) console.log(a, b)
+                if (this.debug) console.log(a, b?b:'')
             },
 
             addMathFunctions(cdata, ymax) {
@@ -388,6 +384,9 @@
         padding: 2px 0;
     }
 
+    .v-list-item__action{
+        margin: 8px 0;
+    }
     .v-text-field.v-text-field--solo .v-input__control {
         min-height: 20px;
     }
diff --git a/src/components/ChartConfig.vue b/src/components/ChartConfig.vue
index 9feb22a..ba8f534 100644
--- a/src/components/ChartConfig.vue
+++ b/src/components/ChartConfig.vue
@@ -88,7 +88,7 @@
 
             <v-list-item>
                 <v-list-item-action>
-                    Maths
+                  <b>Maths Functions</b>
                 </v-list-item-action>
             </v-list-item>
 
diff --git a/src/components/html/Counter.vue b/src/components/html/Counter.vue
index c73830d..1ab18ee 100644
--- a/src/components/html/Counter.vue
+++ b/src/components/html/Counter.vue
@@ -1,7 +1,7 @@
 <template>
     <div :class="'counter '+ classname">
         <button @click="click(-1)" class="bleft">-</button>
-        <span>{{value}}</span>
+        <span>{{input}}</span>
         <button @click="click(1)" class="bright">+</button>
     </div>
 </template>
@@ -17,18 +17,16 @@
             classname: {type: String, default: 'themeGreen'},
         },
         data() {
-            return {
-                value: this.input,
-            }
+            return {}
         },
         methods: {
             click(dirfactor) {
-                this.value = this.value + (dirfactor * this.inc)
-                if (this.value > this.max) this.value = this.max
-                if (this.value < this.min) this.value = this.min
-                this.$emit('input', this.value)
+                let input = this.input + (dirfactor * this.inc)
+                if (input > this.max) input = this.max
+                if (input < this.min) input = this.min
+                this.$emit('input', input)
             }
-        }
+        },
     }
 </script>
 
@@ -44,16 +42,18 @@
         padding: 0;
         width: 15px;
         line-height: 15px;
-    /*/margin: 0 px 3 px 0 px 3 px;*/
+        /*/margin: 0 px 3 px 0 px 3 px;*/
     }
 
     .bleft, .bright {
         border: 0px solid red;
         border-radius: 5px;
     }
+
     .bleft {
         margin-right: 3px;
     }
+
     .bright {
         margin-left: 3px;
     }
@@ -61,14 +61,17 @@
     .themeGreen.counter {
         border: 1px solid #2c3e50;
         background: #d3e3e0;
-        color:white;
+        color: white;
     }
+
     .themeGreen.counter button {
         background: #d3e3e0;
     }
+
     .themeGreen .bleft {
         border-right: 1px solid #2c3e50;
     }
+
     .themeGreen .bright {
         border-left: 1px solid #2c3e50;
     }
@@ -76,16 +79,19 @@
     .themeGrey.counter {
         border: 0px solid #8ecaf9;
         background: inherit;
-        color:white;
+        color: white;
     }
+
     .themeGrey.counter button {
         background: #767676;
         width: 18px;
         line-height: 18px;
     }
+
     .themeGrey .bleft {
         border-right: 0px solid #8ecaf9;
     }
+
     .themeGrey .bright {
         border-left: 0px solid #8ecaf9;
     }