From 52d6c9aa5bd6a51e95608555acbe6ef33e9255d3 Mon Sep 17 00:00:00 2001
From: "gpt-engineer-app[bot]"
 <159125892+gpt-engineer-app[bot]@users.noreply.github.com>
Date: Thu, 21 May 2026 12:57:05 +0000
Subject: [PATCH] Changes

Co-authored-by: Reifonas <211114984+Reifonas@users.noreply.github.com>
---
 src/components/ViewerControls.tsx | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/components/ViewerControls.tsx b/src/components/ViewerControls.tsx
index 85a6b5f..644b04b 100644
--- a/src/components/ViewerControls.tsx
+++ b/src/components/ViewerControls.tsx
@@ -170,6 +170,7 @@ export function ViewerControls() {
           size="sm"
           className="gap-2 h-9"
           onClick={() => setMeasureMode(!measureMode)}
+          title="Clique para marcar pontos · Esc desfaz ponto pendente · Z desfaz última medição"
         >
           <Ruler className="h-3.5 w-3.5" />
           <span className="font-mono text-xs">
@@ -181,6 +182,18 @@ export function ViewerControls() {
           </span>
         </Button>
 
+        {(measurePoints.length > 0 || measurements.length > 0) && (
+          <Button
+            variant="ghost"
+            size="icon"
+            className="h-9 w-9"
+            onClick={undoLastMeasurement}
+            title="Desfazer (Z)"
+          >
+            <Undo2 className="h-3.5 w-3.5 text-muted-foreground" />
+          </Button>
+        )}
+
         {measurements.length > 0 && (
           <Button
             variant="ghost"
@@ -194,6 +207,7 @@ export function ViewerControls() {
         )}
       </div>
 
+
       {/* Screenshot */}
       <Button
         variant="outline"