diff --git a/src/SimNDT/run_setup/constants.py b/src/SimNDT/run_setup/constants.py
new file mode 100644
index 0000000..69ad958
--- /dev/null
+++ b/src/SimNDT/run_setup/constants.py
@@ -0,0 +1,61 @@
+__author__ = 'Miguel Molero'
+
+import sys
+import os
+
+FONT_NAME = "Helvetica"
+SCALE_UI = 1
+
+if sys.platform == "darwin":
+ FONT_SIZE_1 = 13
+ FONT_SIZE_2 = 12
+ FONT_SIZE_3 = 11
+else:
+ FONT_SIZE_1 = 10
+ FONT_SIZE_2 = 9
+ FONT_SIZE_3 = 8
+
+if os.environ.get('HIGH_DPI') == "1":
+ FONT_SIZE_1 = 13
+ FONT_SIZE_2 = 12
+ FONT_SIZE_3 = 11
+ SCALE_UI = 1.4
+
+
+
+if (sys.version_info > (3, 0)):
+
+ RHO = chr(961)
+ MU = chr(956)
+ LAMBDA = chr(955)
+ RHO_LABEL = chr(961) + " (kg/m3)"
+ LAMBDA_LABEL = chr(955) + " (GPa)"
+ MU_LABEL = chr(956) + " (GPa)"
+ ETAV_LABEL = chr(951) + ""+chr(955)+"" + " (GPa)"
+ ETAS_LABEL = chr(951) + ""+chr(956)+"" + " (GPa)"
+
+ VL_LABEL = " VL " + " (m/s)"
+ VT_LABEL = " VT " + " (m/s)"
+
+ MARK = u"\u2713"
+ CROSS = u"\u2718"
+
+else:
+
+ RHO = u"\u03C1"
+ MU = u"\u03BC"
+ LAMBDA = u"\u03BB"
+ RHO_LABEL = u"\u03C1" + " (kg/m3)"
+ LAMBDA_LABEL = u"\u03BB" + " (GPa)"
+ MU_LABEL = u"\u03BC" + " (GPa)"
+ ETAV_LABEL = u'\u0397' + "" + u'\u03BB' + "" + " (GPa)"
+ ETAS_LABEL = u'\u0397' + "" + u'\u03BC' + "" + " (GPa)"
+
+ VL_LABEL = " VL " + " (m/s)"
+ VT_LABEL = " VT " + " (m/s)"
+
+ MARK = u"\u2713"
+ CROSS = u"\u2718"
+
+
+DEGREE_ANGLE = chr(176)