diff --git a/src/assets/handler.svg b/src/assets/handler.svg
new file mode 100644
index 0000000..dd1cfd5
--- /dev/null
+++ b/src/assets/handler.svg
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 width="540.398px" height="540.398px" viewBox="0 0 540.398 540.398" style="enable-background:new 0 0 540.398 540.398;"
+	 xml:space="preserve">
+<g>
+	<g>
+		<path d="M242.207,276.315H88.398c-12.087,0-14.951,6.928-6.407,15.473l29.357,29.357L2.565,429.929
+			c-3.421,3.414-3.421,8.959,0,12.373l95.527,95.533c3.421,3.416,8.96,3.416,12.375,0L219.25,429.054l29.358,29.357
+			c8.543,8.537,15.471,5.672,15.471-6.414V298.194C264.079,286.114,254.281,276.315,242.207,276.315z"/>
+		<path d="M442.306,2.562c-3.421-3.415-8.96-3.415-12.374,0L321.143,111.345l-29.358-29.357c-8.537-8.544-15.465-5.673-15.465,6.407
+			v153.802c0,12.081,9.798,21.879,21.873,21.879H452c12.087,0,14.951-6.928,6.407-15.472l-29.357-29.357l108.783-108.783
+			c3.421-3.415,3.421-8.959,0-12.375L442.306,2.562z"/>
+	</g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+</svg>
diff --git a/src/components/FreeSnapStencil.vue b/src/components/FreeSnapStencil.vue
new file mode 100644
index 0000000..68b6dac
--- /dev/null
+++ b/src/components/FreeSnapStencil.vue
@@ -0,0 +1,136 @@
+<template>
+	<div
+		class="circle-stencil"
+		:style="style"
+	>
+		<draggable-element
+		class="circle-stencil__handler"
+		@drag="onResize"
+		@drag-end="onResizeEnd"
+		>
+			<img :src="require('../assets/handler.svg')" @mousedown.prevent>
+		</draggable-element>
+		<draggable-area @move="onMove" @move-end="onMoveEnd">
+		<stencil-preview
+			class="circle-stencil__preview"
+			:image="image"
+			:coordinates="coordinates"
+			:width="stencilCoordinates.width"
+			:height="stencilCoordinates.height"
+			:transitions="transitions"
+		/>
+		</draggable-area>
+	</div>
+</template>
+
+<script>
+import {
+	DraggableElement,
+	DraggableArea,
+	StencilPreview,
+	ResizeEvent
+} from 'vue-advanced-cropper'
+
+
+export default {
+	name: 'FreeSnapStencil',
+	components: {
+		StencilPreview,
+		DraggableArea,
+		DraggableElement
+	},
+	props: {
+		image: {
+			type: Object
+		},
+		coordinates: {
+			type: Object,
+		},
+		transitions: {
+			type: Object,
+		},
+		stencilCoordinates: {
+			type: Object,
+		},
+		intersections: {
+			type: Array,
+		}
+	},
+	computed: {
+		style() {
+			const { height, width, left, top } = this.stencilCoordinates
+			const style = {
+				width: `${width}px`,
+				height: `${height}px`,
+				transform: `translate(${left}px, ${top}px)`
+			}
+			if (this.transitions && this.transitions.enabled) {
+				style.transition = `${this.transitions.time}ms ${this.transitions.timingFunction}`
+			}
+			return style
+		}
+	},
+	methods: {
+		onMove(moveEvent) {
+			this.$emit('move', moveEvent)
+		},
+		onMoveEnd() {
+			this.$emit('move-end')
+		},
+		onResize(dragEvent) {
+			const shift = dragEvent.shift()
+
+			const widthResize = shift.left
+			const heightResize = -shift.top
+
+			this.$emit('resize', new ResizeEvent(
+				{
+					left: widthResize,
+					right: widthResize,
+					top: heightResize,
+					bottom: heightResize,
+				},
+				{
+					compensate: true,
+				},
+			))
+		},
+		onResizeEnd() {
+			this.$emit('resize-end')
+		},
+		aspectRatios() {
+			return {
+				minimum: 1,
+				maximum: 1
+			}
+		}
+	}
+}
+</script>
+
+<style lang="scss" scoped>
+.circle-stencil {
+	border-radius: 50%;
+	cursor: move;
+	position: absolute;
+	border: dashed 2px white;
+	box-sizing: border-box;
+	&__handler {
+		position: absolute;
+		right: 15%;
+		top: 14%;
+		z-index: 1;
+		cursor: ne-resize;
+		width: 30px;
+		height: 30px;
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		transform: translate(50%, -50%);
+	}
+	&__preview {
+		border-radius: 50%;
+		overflow: hidden;
+	}
+}
+</style>
\ No newline at end of file
diff --git a/src/components/PhotoCropper.vue b/src/components/PhotoCropper.vue
index 5ee135e..39d34e9 100644
--- a/src/components/PhotoCropper.vue
+++ b/src/components/PhotoCropper.vue
@@ -3,8 +3,9 @@
 		<n-space justify="start">
 			<cropper
 				class="cropper"
-				:src="src"
-				:stencil-props="aspect_ratio"
+				:src="snap_to_inters ? srcImageIntersections : src"
+				:stencil-component="this.$options.components.FreeSnapStencil"
+				:stencil-props="stencilProps"
 				:auto-zoom="true"
 				@change="change"
 				ref="cropper"
@@ -27,6 +28,7 @@
 				<n-slider v-model:value="rotate_angle" @update:value="update_rotate" :step="1" :min="-180" :max="180" />
 				<n-checkbox :disabled="free_transform" v-model:checked="lock_aspect_ratio">lock aspect ratio to flip chart size</n-checkbox>
 				<n-checkbox v-model:checked="free_transform">free transform handles</n-checkbox>
+				<n-checkbox v-model:checked="snap_to_inters">snap to intersections</n-checkbox>
 			</n-space>
 		</n-space>
   </div>
@@ -34,39 +36,103 @@
 
 <script>
 import {Cropper} from 'vue-advanced-cropper'
+import FreeSnapStencil from '../components/FreeSnapStencil.vue'
 import 'vue-advanced-cropper/dist/style.css'
 
 
+/* eslint-disable vue/no-unused-components */
 export default {
 	components: {
 		Cropper,
+		FreeSnapStencil,
 	},
 	props: {
 		src: {
 			type: String,
 			required: true,
-		}
+		},
+		inters: {
+			type: Array,
+			required: false,
+			default: () => [],
+		},
 	},
 	data() {
 		return {
+			srcImgElement: null,
+			srcImgLoaded: false,
 			preview_data_url: null,
 			lock_aspect_ratio: true,
 			free_transform: false,
+			snap_to_inters: false,
 			bbox: [],
 			rotate_angle: 0,
 		}
 	},
+	created() {
+		this.srcImgElement = new Image()
+		this.srcImgElement.src = this.src
+		this.srcImgElement.crossOrigin = 'Anonymous'
+		this.srcImgElement.onload = () => {
+			this.srcImgLoaded = true
+		}
+	},
 	computed: {
-		aspect_ratio() { 
+		srcImageIntersections() {
+			if (!this.srcImgLoaded) {
+				return this.src
+			}
+
+			var canvasElement = document.createElement('canvas')
+			canvasElement.width = this.srcImgElement.width
+			canvasElement.height = this.srcImgElement.height
+
+			var ctx = canvasElement.getContext('2d')
+			ctx.drawImage(this.srcImgElement, 0,0)
+			
+			this.drawIntersections(ctx)
+			
+			try {
+				return ctx.canvas.toDataURL()
+			}
+			catch(e) {
+				return this.src
+			}
+		},
+		stencilProps() { 
 			if (this.lock_aspect_ratio) {
 				return {
-					aspectRatio: 1/1.41421356
+					aspectRatio: 1/1.41421356,
+					intersections: this.inters
 				}
 			}
-			return {}
+			return {intersections: this.inters}
 		}
 	},
 	methods: {
+		drawIntersections(ctx) {
+			for (let i=0; i < this.inters.length; i++) {
+				let x = this.inters[i][0]
+				let y = this.inters[i][1]
+				this.drawCircle(
+					ctx, x,y,
+					8, 'rgba(255,255,255,0.9)',
+					'rgba(255,255,255,0.4)', 25)
+			}
+		},
+		drawCircle(ctx, x, y, radius, fill, stroke, strokeWidth) {
+			ctx.beginPath()
+			ctx.arc(x, y, radius, 0, 2 * Math.PI, false)
+			if (fill) {
+				ctx.fillStyle = fill
+				ctx.fill()
+			}
+			if (stroke) {
+				ctx.lineWidth = strokeWidth
+				ctx.strokeStyle = stroke
+				ctx.stroke()
+			}
+		},
 		coordinates_to_bbox(coordinates) {
 			let top_left = [
 				coordinates.left,
@@ -88,8 +154,10 @@ export default {
 			return [top_left, top_right, bottom_right, bottom_left]
 		},
 		change({ coordinates, canvas }) {
-			this.preview_data_url = canvas.toDataURL()
-			this.bbox = this.coordinates_to_bbox(coordinates)
+			try {
+				this.preview_data_url = canvas.toDataURL()
+				this.bbox = this.coordinates_to_bbox(coordinates)
+			} catch (e) {return}
 		},
 		update_rotate() {
 			this.$refs.cropper.appliedImageTransforms= {
diff --git a/src/router/index.js b/src/router/index.js
index 55d6766..8874bd6 100644
--- a/src/router/index.js
+++ b/src/router/index.js
@@ -10,6 +10,7 @@ import LogsList from '../views/LogsList.vue'
 import CreateLog from '../views/CreateLog.vue'
 import CameraCapture from '../views/CameraCapture.vue'
 import ManagePhotos from '../views/ManagePhotos.vue'
+import DevView from '../views/DevView.vue'
 
 const routes = [
 	{
@@ -44,6 +45,11 @@ const routes = [
 		name: 'ManagePhotos',
 		component: ManagePhotos
 	},
+	{
+		path: '/dev',
+		name: 'Development',
+		component: DevView
+	},
 ]
 
 const router = createRouter({
diff --git a/src/views/DevView.vue b/src/views/DevView.vue
new file mode 100644
index 0000000..88f3ff5
--- /dev/null
+++ b/src/views/DevView.vue
@@ -0,0 +1,35 @@
+<template>
+	<div>
+		<h1 class="text-2xl font-bold">Development</h1>
+
+		<PhotoCropper
+			style="max-width:75vw;margin:auto;"
+			:src="photo_src"
+			ref="cropper"
+		/>
+	</div>
+</template>
+
+<script>
+import { useMeta } from 'vue-meta'
+import { useMessage } from 'naive-ui'
+
+import PhotoCropper from '@/components/PhotoCropper'
+
+export default {
+	name: 'DevView',
+	components: {
+		PhotoCropper,
+	},
+	setup() {
+		useMeta({ title: 'Development' })
+		const message = useMessage()
+		return { message }
+	},
+	data() {
+		return { 
+			photo_src: 'https://server.riezel.com/static/original_images/9b5be3b7-7cf9-4720-ad5e-7d516c7e03c1.jpg'
+		}
+	},
+}
+</script>
\ No newline at end of file
diff --git a/src/views/ManagePhotos.vue b/src/views/ManagePhotos.vue
index 29241f8..21f5e7a 100644
--- a/src/views/ManagePhotos.vue
+++ b/src/views/ManagePhotos.vue
@@ -11,7 +11,10 @@
 				:name="group.id">
 				<template #header-extra>{{ group.date }}</template>
 
-				<p v-if="!photos[group.id]">loading...</p>
+				<div style="text-align: center">
+					<p v-if="is_group_loading.get(group.id)">loading...</p>
+					<p v-else-if="!photos[group.id]">no photos in group found</p>
+				</div>
 
 				<n-space>
 					<PhotoItem
@@ -44,6 +47,7 @@
 				<PhotoCropper
 					style="max-width:75vw;margin:auto;"
 					:src="current_photo_src"
+					:inters="current_photo_intersections"
 					ref="cropper"
 				/>
 				
@@ -148,6 +152,7 @@ export default {
 	data() {
 		return {
 			current_photo: null,
+			current_photo_intersections: null,
 
 			showChangeGroupModal: false,
 			showCropModal: false,
@@ -157,6 +162,8 @@ export default {
 			new_group: null,
 			current_ocr_text: '',
 			current_photo_src: null,
+
+			is_group_loading: new Map(),
 		}
 	},
 	computed: {
@@ -199,8 +206,10 @@ export default {
 	},
 	methods: {
 		loadPhotosInGroup(group_data) {
+			this.is_group_loading.set(group_data.name, true)
 			if (group_data.expanded)
 				this.$store.dispatch('loadPhotosInGroup', group_data.name)
+					.finally(() => this.is_group_loading.set(group_data.name, false))
 		},
 		getPhotoSrcById(photo_id){
 			for (const index in this.photos) {
@@ -221,7 +230,9 @@ export default {
 		change_crop_modal(photo_id) {
 			this.current_photo = photo_id
 			this.showCropModal = true
-			this.current_photo_src = this.$store.getters.photoById(photo_id).original_image
+			let photo = this.$store.getters.photoById(photo_id)
+			this.current_photo_src = photo.original_image
+			this.current_photo_intersections = photo.intersections
 		},
 		change_ocr_modal(photo_id) {
 			this.current_photo = photo_id