Switch to side-by-side view

--- a
+++ b/paf-prediction-challenge-database-1.0.0/n12.hea
@@ -0,0 +1,3 @@
+n12 2 128 230400
+n12.dat 16 200/mV 12 0 -20 -18447 0 ECG0
+n12.dat 16 200/mV 12 0 8 15865 0 ECG1