diff --git a/main.c b/main.c
index 6012017..fa3ba32 100644
--- a/main.c
+++ b/main.c
@@ -99,16 +99,25 @@ void DrawInterferenceViewCPU(Michelson *mic, Rectangle rec) {
     DrawLine(cx, cy - 10, cx, cy + 10, Fade(WHITE, 0.5f));
 }
 
-void DrawInterferenceViewGPU(Michelson *mic, Rectangle rec, Shader shader) {
+void DrawInterferenceViewGPU(Michelson *mic, Rectangle rec, Shader shader, bool *isFullscreen) {
     
     DrawRectangleRec((Rectangle){rec.x - 4, rec.y - 30, rec.width + 8, rec.height + 34}, COLOR_PANEL);
     DrawText("ECRAN", rec.x, rec.y - 26, 20, COLOR_TEXT_DIM);
 
+    const char* btnText = *isFullscreen ? "PETIT" : "GRAND";
+    if (GuiButton((Rectangle){rec.x + rec.width - 80, rec.y - 28, 80, 24}, btnText)) {
+        *isFullscreen = !(*isFullscreen);
+    }
+    if (CheckCollisionPointRec(GetMousePosition(), (Rectangle){rec.x + rec.width - 80, rec.y - 28, 80, 24})) {
+        DrawText("(Touche F)", rec.x + rec.width - 160, rec.y - 22, 10, GRAY);
+    }
+
     // Shader glsl 
     float centerX = rec.x + rec.width / 2.0f;
     float centerY = rec.y + rec.height / 2.0f;
     float center[2] = { centerX, centerY };
     float scrHeight = (float)GetScreenHeight();
+    float zoom = *isFullscreen ? 0.7 : 1; 
 
     //
     SetShaderValue(shader, GetShaderLocation(shader, "center"), center, SHADER_UNIFORM_VEC2);
@@ -118,6 +127,7 @@ void DrawInterferenceViewGPU(Michelson *mic, Rectangle rec, Shader shader) {
     SetShaderValue(shader, GetShaderLocation(shader, "d2"), &mic->d2, SHADER_UNIFORM_FLOAT);
     SetShaderValue(shader, GetShaderLocation(shader, "lambda"), &mic->lambda, SHADER_UNIFORM_FLOAT);
     SetShaderValue(shader, GetShaderLocation(shader, "angleM1"), &mic->angleM1, SHADER_UNIFORM_FLOAT);
+    SetShaderValue(shader, GetShaderLocation(shader, "zoom"), &zoom, SHADER_UNIFORM_FLOAT);
 
     // GPU
     BeginShaderMode(shader);
@@ -294,7 +304,7 @@ void DrawControlPanel(Michelson *mic) {
     int fps = GetFPS();
     Color fpsColor = (fps >= 100) ? COLOR_ACCENT : (fps >= 60 ? GREEN : (fps >= 30 ? ORANGE : RED));
     DrawText("STATUT:", startX, bottomY + 12, 20, COLOR_TEXT_DIM);
-    DrawText(TextFormat("GPU MODE | %i FPS", fps), startX + 100, bottomY + 12, 20, fpsColor);
+    DrawText(TextFormat("%i FPS", fps), startX + 100, bottomY + 12, 20, fpsColor);
 }
 
 int main () {
@@ -311,10 +321,17 @@ int main () {
     mic.lambda = 550.0f;
     mic.angleM1 = 0.0f;
 
-    Rectangle screenViewBounds = {1920 - 530, 50, 500, 500};
+    bool isFullscreen = false;
+
+    Rectangle normalBounds = {1920 - 530, 50, 500, 500};
+    Rectangle fullScreenBounds = {UI_WIDTH + 10, 40, 1920 - UI_WIDTH - 20, 1030};
     //Rectangle screenViewBounds = {400, 0, 1080, 1080};
 
     while (!WindowShouldClose()) {
+        if (IsKeyPressed(KEY_F)) {
+            isFullscreen = !isFullscreen;
+        }
+        Rectangle currentViewBounds = isFullscreen ? fullScreenBounds : normalBounds;
         BeginDrawing();
             ClearBackground(COLOR_BG);
             // Grille fond
@@ -323,7 +340,7 @@ int main () {
 
             DrawMichelsonSchema(&mic);
             DrawControlPanel(&mic);
-            DrawInterferenceViewGPU(&mic, screenViewBounds, shader);
+            DrawInterferenceViewGPU(&mic, currentViewBounds, shader, &isFullscreen);
         EndDrawing();
     }
     CloseWindow();
diff --git a/michelson b/michelson
index a43bda8..537eb3b 100755
Binary files a/michelson and b/michelson differ
diff --git a/michelson.fs b/michelson.fs
index 3d8cca1..e10b4e6 100644
--- a/michelson.fs
+++ b/michelson.fs
@@ -13,6 +13,7 @@ uniform float d1;
 uniform float d2;
 uniform float lambda;
 uniform float angleM1;
+uniform float zoom;
 
 const float PI = 3.14159265359;
 
@@ -40,8 +41,8 @@ void main() {
     // Diff de marche du à l'axe (2 * e) + micro -> nano
     float deltaLnm = 2.0 * (d1 - d2) * 1000.0;
 
-    float relX = (pixelX - center.x);
-    float relY = (pixelY - center.y);
+    float relX = (pixelX - center.x) * zoom;
+    float relY = (pixelY - center.y) * zoom;
    
     vec3 baseColorVec = WavelengthToRGB(lambda);