diff --git a/config.cpp b/config.cpp
index cdcdb176..b8e60a27 100644
--- a/config.cpp
+++ b/config.cpp
@@ -1809,6 +1809,9 @@ unordered_map<string, ld&> params = {
   {"mobius", vid.skiprope},
   {"a", anims::a},
   {"b", anims::b},
+  {"sang", conformal::spiral_angle},
+  {"spiralx", conformal::spiral_x},
+  {"spiraly", conformal::spiral_y},
   };
 
 }
diff --git a/conformal.cpp b/conformal.cpp
index 310c2f0d..c6727535 100644
--- a/conformal.cpp
+++ b/conformal.cpp
@@ -820,7 +820,7 @@ namespace conformal {
       dialog::add_action([](){
         dialog::editNumber(spiral_x, -20, 20, 1, 10, XLAT("spiral period: x"), "");
         });
-      dialog::addSelItem(XLAT("spiral period: y"), fts(spiral_x), 'y');
+      dialog::addSelItem(XLAT("spiral period: y"), fts(spiral_y), 'y');
       dialog::add_action([](){
         dialog::editNumber(spiral_y, -20, 20, 1, 10, XLAT("spiral period: y"), "");
         });
@@ -1093,6 +1093,11 @@ namespace conformal {
       PHASEFROM(2); 
       shift_arg_formula(conformal::spiral_angle);
       }
+    else if(argis("-sxy")) { 
+      PHASEFROM(2); 
+      shift_arg_formula(conformal::spiral_x);
+      shift_arg_formula(conformal::spiral_y);
+      }
     else if(argis("-mob")) { 
       PHASEFROM(2); 
       shift_arg_formula(vid.skiprope);
diff --git a/hyper.h b/hyper.h
index 43901ddc..52e6bb40 100644
--- a/hyper.h
+++ b/hyper.h
@@ -1286,6 +1286,7 @@ namespace conformal {
   extern bool model_straight;
   extern ld model_transition;
   extern ld top_z;
+  extern ld spiral_angle, spiral_x, spiral_y;
   
   // screen coordinates to logical coordinates: apply_orientation(x,y)
   // logical coordinates back to screen coordinates: apply_orientation(y,x)