This indicates the string E either high or low.
it means to tab knapp a guitar.
hammer-on
Sample Guitar Tab with no notes: E |-----------------------------| (this line signifies the thinnest string on your guitar) B |-----------------------------| G |-----------------------------| D |-----------------------------| A |-----------------------------| E |-----------------------------| (this line singnifies the thickest string on your guitar)
Tab is a form of music that many guitar players read.
E/a/e/b/e
it usually means to slide from one fret to another
Guitar pro tab information can be found in a variety of places. The best place to look for Guitar Pro Tab is a store like Guitar Super Centers. They carry a lot of guitar products.
if on a tab it says 3 |---2p0h3----| |----3--4--2-3| its saying play tab 2 pull off open string hammer on 3
If i understood you right you press the red guitar icon in the tab at the left top.
They are both programs you can download which show the guitar tab and play the tab around the same speed as the actual song, making the song easier to learn since you know when to play which note.
Palm mute
Probably just means another symbol for a slide :)