Hammer Ons and Pull Offs
Hammering On Tutorial | Pulling Off Tutorial
It's most common to see the letter h representing a hammer on, located within the tablature between the original fret, and the hammered on fret (e.g. 7h9)
Similarly, the letter p is generally used to represent a pull off, also found in the same location within the tablature (e.g. 9p7)
Ocassionally, you'll see the ^ symbol used for either a hammer on or pull off (eg. 9^7).
