Switch to side-by-side view

--- a
+++ b/paf-prediction-challenge-database-1.0.0/n23.hea
@@ -0,0 +1,3 @@
+n23 2 128 230400
+n23.dat 16 200/mV 12 0 4 28049 0 ECG0
+n23.dat 16 200/mV 12 0 2 21932 0 ECG1