diff --git a/src/draw.c b/src/draw.c
index e7903243..85cd3446 100644
--- a/src/draw.c
+++ b/src/draw.c
@@ -3886,6 +3886,8 @@ cairo_status_t png_writer(void *in_closure, const unsigned char *in_data, unsign
  *    4: set black to transparent
  *    8: set transparent to white 
  *   16: set transparent to black
+ *   32: blend with white, remove alpha
+ *   64: blend with black, remove alpha
  *  256: write back into `image_data` attribute
  */
 int edit_image(int what, xRect *r)
@@ -3962,6 +3964,19 @@ int edit_image(int what, xRect *r)
         if(a == 0) {r = g = b = 0x00; a = 0xff;} 
       }
 
+      /* remove alpha, blend with white */
+      if(what & 32) {
+        r += (unsigned char)(0xff - a);
+        g += (unsigned char)(0xff - a);
+        b += (unsigned char)(0xff - a);
+        a  = (unsigned char)0xff;
+      }
+
+      /* remove alpha, blend with black */
+      if(what & 64) {
+        a  = (unsigned char)0xff;
+      }
+
       /* write result back */
       ptr[3] = a;
       ptr[2] = r;
diff --git a/src/scheduler.c b/src/scheduler.c
index ce542570..08b015e4 100644
--- a/src/scheduler.c
+++ b/src/scheduler.c
@@ -2063,6 +2063,8 @@ int xschem(ClientData clientdata, Tcl_Interp *interp, int argc, const char * arg
         if(!strcmp(argv[i], "black_transp")) what |=   4;
         if(!strcmp(argv[i], "transp_white")) what |=   8;
         if(!strcmp(argv[i], "transp_black")) what |=  16;
+        if(!strcmp(argv[i], "blend_white"))  what |=  32;
+        if(!strcmp(argv[i], "blend_black"))  what |=  64;
         if(!strcmp(argv[i], "write_back"))   what |= 256;
       }
       if(what) {