diff --git a/main.cpp b/main.cpp
index 25320ce..6fb2d19 100644
--- a/main.cpp
+++ b/main.cpp
@@ -24,7 +24,7 @@ int main(int argc, char *argv[])
 
     SDL_Init(SDL_INIT_EVERYTHING);
     z80debug::show();
-    zxscreen::show();
+    zxscreen::init();
 
     zx_ula::sound_init();
 
@@ -75,15 +75,19 @@ int main(int argc, char *argv[])
                 }
             } else {
                 if (e.type == SDL_KEYDOWN) {
-                    if (e.key.keysym.scancode==SDL_SCANCODE_F8) {
+                    if (e.key.keysym.scancode==SDL_SCANCODE_F1) {
+                        zxscreen::decZoom();
+                    } else if (e.key.keysym.scancode==SDL_SCANCODE_F2) {
+                        zxscreen::incZoom();
+                    } else if (e.key.keysym.scancode==SDL_SCANCODE_F3) {
+                        zxscreen::toggleFullscreen();
+                    } else if (e.key.keysym.scancode==SDL_SCANCODE_F8) {
                         z80debug::stop();
                         zxscreen::redraw();
-                    }
-                    if (e.key.keysym.scancode==SDL_SCANCODE_F12) {
+                    } else if (e.key.keysym.scancode==SDL_SCANCODE_F12) {
                         zx_tape::go_berserk();
                         zx_tape::play();
-                    }
-                    if (e.key.keysym.scancode==SDL_SCANCODE_F11) {
+                    } else if (e.key.keysym.scancode==SDL_SCANCODE_F11) {
                         zx_tape::rewind();
                     }
                 }
diff --git a/zx_screen.cpp b/zx_screen.cpp
index b16d4a8..75fe6d0 100644
--- a/zx_screen.cpp
+++ b/zx_screen.cpp
@@ -13,6 +13,10 @@ namespace zxscreen
     SDL_Window *win = nullptr;
     SDL_Renderer *ren = nullptr;
     SDL_Texture *tex = nullptr;
+    uint8_t zoom = 1;
+    bool fullscreen = false;
+    int fullscreen_scale = 1;
+    SDL_Rect dest_rect;
 
     uint32_t time=0;
 
@@ -78,19 +82,46 @@ namespace zxscreen
             //border
             for (int j=0;j<176;++j) { *(ptr_pixel++) = 0; *(ptr_color++) = 1; count+=2; }
         }
-        printf("COUNT: %i\n", count);
+        //printf("COUNT: %i\n", count);
     }
 
-    void show()
+    void reinit()
     {
-        if (win) return;
-        win = SDL_CreateWindow("ZX Spectrum Screen", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 352, 296, SDL_WINDOW_SHOWN);
+        if (tex) SDL_DestroyTexture(tex);
+        if (ren) SDL_DestroyRenderer(ren);
+        if (win) SDL_DestroyWindow(win);
+
+        const int z = fullscreen ? 1 : zoom;
+        win = SDL_CreateWindow("ZX Spectrum Screen", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 352*z, 296*z, fullscreen?SDL_WINDOW_FULLSCREEN_DESKTOP:SDL_WINDOW_SHOWN);
         ren = SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED);
         tex = SDL_CreateTexture(ren, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, 352, 296);
-        create_tables();
+
+        if (fullscreen)        
+        {
+            int w, h;
+            SDL_GetWindowSize(win, &w, &h);
+            fullscreen_scale = h/296;
+            dest_rect.w = 352 * fullscreen_scale;
+            dest_rect.h = 296 * fullscreen_scale;
+            dest_rect.x = (w - dest_rect.w)/2;
+            dest_rect.y = (h - dest_rect.h)/2;
+        }
+        else
+        {
+            dest_rect.x = dest_rect.y = 0;
+            dest_rect.w = 352 * zoom;
+            dest_rect.h = 296 * zoom;
+        }
+        
         redraw();
     }
 
+    void init()
+    {
+        create_tables();
+        reinit();
+    }
+
     void refresh(const uint8_t dt)
     {
         const uint8_t* memory = z80::getMem();
@@ -151,7 +182,46 @@ namespace zxscreen
         SDL_LockTexture(tex, NULL, (void**)&pixels, &pitch);
         for (int i=0; i<352*296;++i) *(pixels++) = palette[zx_pixels[i]];
         SDL_UnlockTexture(tex);
-        SDL_RenderCopy(ren, tex, NULL, NULL);
+
+        if (fullscreen)
+        {
+            SDL_SetRenderDrawColor(ren, 0, 0, 0, 255);
+            SDL_RenderClear(ren);
+        }
+
+        // Pintem la textura a pantalla
+        SDL_RenderCopy(ren, tex, NULL, &dest_rect);
+
         SDL_RenderPresent(ren);
     }
+
+    void setZoom(const int value)
+    {
+        if (value < 1) return;
+        SDL_DisplayMode dm;
+        SDL_GetCurrentDisplayMode(0, &dm);
+
+        if (352*value > dm.w) return;
+        if (296*value > dm.h) return;
+
+        zoom = value;
+        reinit();
+    }
+
+    void incZoom()
+    {
+        setZoom(zoom+1);
+    }
+
+    void decZoom()
+    {
+        setZoom(zoom-1);
+    }
+
+    void toggleFullscreen()
+    {
+        fullscreen = !fullscreen;
+        reinit();
+    }
+
 }
diff --git a/zx_screen.h b/zx_screen.h
index 6d86042..64f9485 100644
--- a/zx_screen.h
+++ b/zx_screen.h
@@ -3,7 +3,12 @@
 
 namespace zxscreen
 {
-    void show();
+    void init();
+    void reinit();
     void refresh(const uint8_t dt);
     void redraw();
+
+    void incZoom();
+    void decZoom();
+    void toggleFullscreen();
 }