diff --git a/mtor/dataproc.py b/mtor/dataproc.py
index 8dd35cb..aa7e805 100644
--- a/mtor/dataproc.py
+++ b/mtor/dataproc.py
@@ -59,9 +59,9 @@ def peakplot_iloc(x, y, ix1, ix1_label="peaks", ix2=None, ix2_label="peaks"):
     pyplot.plot(
         x.iloc[ix1],
         y.iloc[ix1],
-        "r+",
-        ms=5,
-        mew=2,
+        "rx",
+        ms=8,
+        mew=3,
         label=f"{num_items} {ix1_label}",
     )
     if ix2 is not None:
@@ -69,9 +69,9 @@ def peakplot_iloc(x, y, ix1, ix1_label="peaks", ix2=None, ix2_label="peaks"):
         pyplot.plot(
             x.iloc[ix2],
             y.iloc[ix2],
-            "g1",
-            ms=5,
-            mew=2,
+            "k1",
+            ms=8,
+            mew=3,
             label=f"{num_items} {ix2_label}",
         )
     pyplot.legend()
diff --git a/mtor/gui.py b/mtor/gui.py
index e60e20a..0b2bfab 100644
--- a/mtor/gui.py
+++ b/mtor/gui.py
@@ -181,7 +181,7 @@ def run_gui():
             Popen(
                 cmd,
                 shell=False,
-                stding=None,
+                stdin=None,
                 stdout=None,
                 stderr=None,
                 close_fds=True,