Switch to side-by-side view

--- a
+++ b/paf-prediction-challenge-database-1.0.0/n20c.hea
@@ -0,0 +1,3 @@
+n20c 2 128 38400
+n20c.dat 16 200/mV 12 0 0 9239 0 ECG0
+n20c.dat 16 200/mV 12 0 0 -24513 0 ECG1