Glide delays the voltage change between notes for a sliding pitch effect.
Time- This sets the rate of pitch change with higher settings corresponding to longer times.
Portamento- Enables portamento mode; this is a standard glide effect where notes glide from one pitch to the next instead of discretely changing pitch.
Gliss- Enables glissando mode; this is similar to portamento, but instead of note patches smooth changing (like a trombone or slide whistle), the notes change in 1/2 steps (like running your finger down a guitar string on a fretboard).
Either Portamento or Glide mode can be selected, or both can be disabled. Portamento and Glide cannot both be selected at the same time, because to quote Steven Wright, you can't everything... where would you put it?