diff --git a/inventory/templates/testing.html b/inventory/templates/testing.html
index 8989699..3134152 100644
--- a/inventory/templates/testing.html
+++ b/inventory/templates/testing.html
@@ -63,6 +63,11 @@
                         <path d="M0 2a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2z" />
                     </svg>
                 </label>
+
+                <input type="radio" class="btn-check" id="line" name="tool">
+                <label for="line" class="btn btn-sm btn-light border d-inline-flex align-items-center justify-content-center">
+                    ⎯
+                </label>
             </div>
         </div>
         <span id="dot" class="position-absolute p-0 m-0 d-none">
@@ -89,12 +94,17 @@
     let dpr = 1;
     let selectedColor = '#000000';
 
-    let currentRect = null;
-    let rects = [];
+    let currentShape = null;
+    let shapes = [];
 
     resizeAndSetupCanvas();
     window.addEventListener('resize', resizeAndSetupCanvas);
 
+    function getActiveTool() {
+        const checked = document.querySelector('input[name="tool"]:checked');
+        return checked ? checked.id : 'outline';
+    }
+
     function snapToGrid(x, y) {
         const rect = gridEl.getBoundingClientRect();
         const clampedX = Math.min(Math.max(x, rect.left), rect.right);
@@ -113,14 +123,20 @@
         };
     }
 
-    function normalizeRect(rect) {
+    function normalizeRect(shape) {
+        const x = Math.min(shape.x1, shape.x2);
+        const y = Math.min(shape.y1, shape.y2);
+        const w = Math.abs(shape.x2 - shape.x1);
+        const h = Math.abs(shape.y2 - shape.y1);
+
         return {
-            x: Math.min(rect.x1, rect.x2),
-            y: Math.min(rect.y1, rect.y2),
-            w: Math.abs(rect.x2 - rect.x1),
-            h: Math.abs(rect.y2 - rect.y1),
-            color: rect.color,
-            fill: rect.fill
+            type: 'rect',
+            x,
+            y,
+            w,
+            h,
+            color: shape.color,
+            fill: shape.fill
         };
     }
 
@@ -141,20 +157,29 @@
         if (!ctx) return;
 
         clearCanvas();
-        rects.forEach(drawRect);
+        shapes.forEach(drawShape);
     }
 
-    function drawRect(rect) {
+    function drawShape(shape) {
+        if (!ctx) return;
+
         ctx.save();
+        ctx.strokeStyle = shape.color || '#000000';
 
-        ctx.strokeStyle = rect.color;
-        ctx.strokeRect(rect.x, rect.y, rect.w, rect.h);
+        if (shape.type === 'rect') {
+            ctx.strokeRect(shape.x, shape.y, shape.w, shape.h);
 
-        if (rect.fill) {
-            ctx.globalAlpha = 0.15;
-            ctx.fillStyle = rect.color;
-            ctx.fillRect(rect.x, rect.y, rect.w, rect.h);
-            ctx.globalAlpha = 1;
+            if (shape.fill) {
+                ctx.globalAlpha = 0.15;
+                ctx.fillStyle = shape.color;
+                ctx.fillRect(shape.x, shape.y, shape.w, shape.h);
+                ctx.globalAlpha = 1;
+            }
+        } else if ( shape.type === 'line' ) {
+            ctx.beginPath();
+            ctx.moveTo(shape.x1, shape.y1);
+            ctx.lineTo(shape.x2, shape.y2);
+            ctx.stroke();
         }
 
         ctx.restore();
@@ -177,12 +202,12 @@
 
         if ((e.ctrlKey || e.metaKey) && key === 'z') {
             e.preventDefault();
-            rects.pop();
+            shapes.pop();
             redrawAll();
         }
 
-        if (key === 'escape' && currentRect) {
-            currentRect = null;
+        if (key === 'escape' && currentShape) {
+            currentShape = null;
             redrawAll();
         }
     });
@@ -201,18 +226,36 @@
         dotEl.style.top = `${renderY}px`;
         dotEl.style.left = `${renderX}px`;
 
-        if (currentRect) {
-            const previewRect = normalizeRect({
-                ...currentRect,
-                x2: snapX,
-                y2: snapY
-            });
+        if (currentShape) {
+            const tool = currentShape.tool;
 
             clearCanvas();
-            rects.forEach(drawRect);
+            shapes.forEach(drawShape);
+
+            ctx.save();
             ctx.setLineDash([5, 3]);
-            drawRect(previewRect);
+
+            if (tool === 'line') {
+                const previewLine = {
+                    type: 'line',
+                    x1: currentShape.x1,
+                    y1: currentShape.y1,
+                    x2: snapX,
+                    y2: snapY,
+                    color: currentShape.color
+                };
+                drawShape(previewLine);
+            } else {
+                const previewRect = normalizeRect({
+                    ...currentShape,
+                    x2: snapX,
+                    y2: snapY
+                });
+                drawShape(previewRect);
+            }
+
             ctx.setLineDash([]);
+            ctx.restore();
         }
     });
 
@@ -228,34 +271,66 @@
 
         if (e.target.closest('#toolBar')) return;
 
-        const {ix, iy, x: snapX, y: snapY} = snapToGrid(e.clientX, e.clientY);
+        const {x: snapX, y: snapY} = snapToGrid(e.clientX, e.clientY);
+        const tool = getActiveTool();
 
-        currentRect = {
-            x1: snapX,
-            y1: snapY,
-            x2: snapX,
-            y2: snapY,
-            color: selectedColor,
-            fill: document.getElementById('filled').checked
-        };
+        if (tool === 'line') {
+            currentShape = {
+                tool,
+                type: 'line',
+                x1: snapX,
+                y1: snapY,
+                x2: snapX,
+                y2: snapY,
+                color: selectedColor
+            };
+        } else {
+            currentShape = {
+                tool,
+                x1: snapX,
+                y1: snapY,
+                x2: snapX,
+                y2: snapY,
+                color: selectedColor,
+                fill: document.getElementById('filled').checked
+            };
+        }
     });
 
     window.addEventListener('mouseup', (e) => {
-        if (!currentRect) return;
+        if (!currentShape) return;
 
-        const {ix, iy, x: snapX, y: snapY } = snapToGrid(e.clientX, e.clientY);
+        const { x: snapX, y: snapY } = snapToGrid(e.clientX, e.clientY);
 
-        currentRect.x2 = snapX;
-        currentRect.y2 = snapY;
+        currentShape.x2 = snapX;
+        currentShape.y2 = snapY;
 
-        const finalRect = normalizeRect(currentRect);
+        let finalShape = null;
 
-        if (finalRect.w > 0 && finalRect.h > 0) {
-            rects.push(finalRect);
+        if (currentShape.tool === 'line') {
+            finalShape = {
+                type: 'line',
+                x1: currentShape.x1,
+                y1: currentShape.y1,
+                x2: currentShape.x2,
+                y2: currentShape.y2,
+                color: currentShape.color
+            };
+        } else {
+            const rect = normalizeRect(currentShape);
+
+            if (rect.w > 0 && rect.h > 0) {
+                finalShape = rect;
+            }
         }
-        clearCanvas();
-        rects.forEach(drawRect);
 
-        currentRect = null;
+        if (finalShape) {
+            shapes.push(finalShape);
+        }
+
+        clearCanvas();
+        shapes.forEach(drawShape);
+
+        currentShape = null;
     });
 {% endblock %}
\ No newline at end of file