diff --git a/synthDC/scripts/synth.tcl b/synthDC/scripts/synth.tcl
index 9d6aac68a..368e45f3a 100755
--- a/synthDC/scripts/synth.tcl
+++ b/synthDC/scripts/synth.tcl
@@ -137,6 +137,10 @@ if {$tech == "sky130"} {
 # Set the wire load model 
 set_wire_load_mode "top"
 
+# Set switching activities
+# default activity factors are 1 for clocks, 0.1 for others
+# static probability of 0.5 is used for leakage
+
 # Attempt Area Recovery - if looking for minimal area
 # set_max_area 2000
 
@@ -359,4 +363,4 @@ redirect $filename { report_constraint }
 set filename [format "%s%s%s%s" $outputDir  "/reports/" $my_toplevel "_hier.rep"]
 # redirect $filename { report_hierarchy }
 
-quit 
+#quit