“EXP 1/2, FS 4/5 Connect an expression pedal here to adjust a wide variety of parameters. With a Y-cable (tip-ring-sleeve 1/4" jack, split to two tip-sleeve 1/4" jacks), two expression pedals can be connected. Alternatively, one (or with a Y-cable, two) external footswitches can be added to access additional stomps, presets, snapshots, etc. (FS4=tip, FS5=ring). To set this jack's function(s), see page 41. By default, this jack is set to accommodate a Mission SP1-L6H Line 6 Expression Pedal, which has a toe switch that toggles between EXP 1 (Wah/ Pitch Wham) and EXP 2 (Volume/Pan). For external footswitches, the momentary (unlatched) type should be used.”
2 footswitches or 2 expression pedals can be connected at the same time, so I assumed that I can use one of each.