Fingerpicking pattern 4 introduces the technique of playing two notes together, which is represented by a curved line:
Pattern 4
← This indicates that the i and m fingers play together.
Em
Both notes should be heard clearly and have equal volume. The following exercise is in ^ time and involves alternate picking. Emphasize the first beat of each bar (the bass note) and be sure to hold it for three counts. A new chord, E minor, is introduced.
Pattern Four