diff --git a/TODO.md b/TODO.md
new file mode 100644
index 0000000..ec9062b
--- /dev/null
+++ b/TODO.md
@@ -0,0 +1,7 @@
+* plot cli command should show by default, not save
+* logger should hook to pbar when it exists
+* find a way to make evaluator debugging easier
+
+# Ideas
+
+* have a `scan` section in the config to more granularly control parameter scanning. That way, the user provides single default values to all necessary parameters and then call the single-sim or scan commands to run the config accordingly.
\ No newline at end of file
diff --git a/src/scgenerator/evaluator.py b/src/scgenerator/evaluator.py
index 810f0fa..fbc7895 100644
--- a/src/scgenerator/evaluator.py
+++ b/src/scgenerator/evaluator.py
@@ -234,7 +234,7 @@ class Evaluator:
                             else:
                                 v_str = format(returned_value).replace("\n", "")
                                 success_str = f"computed {param_name}={v_str} "
-                            self.logger.info(
+                            self.logger.debug(
                                 prefix
                                 + success_str
                                 + f"using {rule.func.__name__} from {rule.func.__module__}"
@@ -382,6 +382,9 @@ default_rules: list[Rule] = [
     ),
     Rule("n2", materials.gas_n2),
     Rule("n2", lambda: 2.2e-20, priorities=-1),
+    Rule("gamma", lambda gamma_arr: gamma_arr[0], priorities=-1),
+    Rule("gamma", fiber.gamma_parameter),
+    Rule("gamma_arr", fiber.gamma_parameter, ["n2", "w0", "A_eff_arr"]),
     # operators
     Rule("n_op", operators.ConstantRefractiveIndex),
     Rule("n_op", operators.MarcatiliRefractiveIndex),
@@ -411,10 +414,6 @@ envelope_rules = default_rules + [
         fiber.load_custom_dispersion,
         priorities=[2, 2, 2],
     ),
-    # Nonlinearity
-    Rule("gamma", lambda gamma_arr: gamma_arr[0], priorities=-1),
-    Rule("gamma", fiber.gamma_parameter),
-    Rule("gamma_arr", fiber.gamma_parameter, ["n2", "w0", "A_eff_arr"]),
     # Operators
     Rule("gamma_op", operators.ConstantGamma, priorities=1),
     Rule("gamma_op", operators.ConstantScalarGamma),
@@ -446,6 +445,7 @@ full_field_rules = default_rules + [
     # Dispersion
     Rule(["wl_for_disp", "dispersion_ind"], fiber.lambda_for_full_field_dispersion),
     Rule("frame_velocity", fiber.frame_velocity),
+    Rule("beta2", lambda beta2_arr, w0_ind: beta2_arr[w0_ind]),
     # Nonlinearity
     Rule("chi3", materials.gas_chi3),
     # Operators
diff --git a/src/scgenerator/physics/fiber.py b/src/scgenerator/physics/fiber.py
index 7bea7e3..74fa9ad 100644
--- a/src/scgenerator/physics/fiber.py
+++ b/src/scgenerator/physics/fiber.py
@@ -627,6 +627,7 @@ def beta2(w_for_disp: np.ndarray, n_eff: np.ndarray) -> np.ndarray:
     return np.gradient(np.gradient(beta(w_for_disp, n_eff), w_for_disp), w_for_disp)
 
 
+
 def frame_velocity(beta1_arr: np.ndarray, w0_ind: int) -> float:
     return 1.0 / beta1_arr[w0_ind]
 
diff --git a/src/scgenerator/physics/simulate.py b/src/scgenerator/physics/simulate.py
index a36ad16..17b7079 100644
--- a/src/scgenerator/physics/simulate.py
+++ b/src/scgenerator/physics/simulate.py
@@ -131,6 +131,7 @@ class RK4IP:
     def run(self) -> list[np.ndarray]:
         time_start = datetime.today()
         state = self.init_state
+        self.logger.info(f"integration scheme : {self.params.integration_scheme}")
         for num, state in self.irun():
             if self.save_data:
                 self._save_current_spectrum(state.actual_spectrum, num)
diff --git a/src/scgenerator/plotting.py b/src/scgenerator/plotting.py
index 691ca7c..6114fd5 100644
--- a/src/scgenerator/plotting.py
+++ b/src/scgenerator/plotting.py
@@ -897,7 +897,7 @@ def uniform_axis(
         plt_range = new_axis_spec
     else:
         raise TypeError(f"Don't know how to interpret {new_axis_spec}")
-        
+
     tmp_axis, ind, ext = sort_axis(axis, plt_range)
     values = np.atleast_2d(values)
     if np.allclose((diff := np.diff(tmp_axis))[0], diff):
diff --git a/src/scgenerator/variationer.py b/src/scgenerator/variationer.py
index bc9b26a..95dca5f 100644
--- a/src/scgenerator/variationer.py
+++ b/src/scgenerator/variationer.py
@@ -23,7 +23,8 @@ class Variationer:
 
     Example
     -------
-    `>> var = Variationer([dict(a=[1, 2]), [dict(b=["000", "111"], c=["a", "-1"])]])
+    ```
+    >> var = Variationer([dict(a=[1, 2]), [dict(b=["000", "111"], c=["a", "-1"])]])
     list(v.raw_descr for v in var.iterate())
 
     [
@@ -31,8 +32,8 @@ class Variationer:
         ((("a", 1),), (("b", "111"), ("c", "-1"))),
         ((("a", 2),), (("b", "000"), ("c", "a"))),
         ((("a", 2),), (("b", "111"), ("c", "-1"))),
-    ]`
-
+    ]
+    ```
     """
 
     all_indices: list[list[int]]