When FROM2 is supplied or the Mode is set to Add Points this gives the number of points which should be added to the morph. This should be smaller than the MAXP/Test Points value.
Depending on the MINDIFF/Min Seperation value the actual number of points may be smaller than the number requested.
From the GUI this defaults to 50 which may be a reasonable value.
The A key can be used to increase this value. With the shift key the value is decreased.