2006/11/9 Version 2.1
o GEL(General ellipsoid) was added.

2007/2/7 Version 2.1.1
o Bug fix
In several countries (for example France), "," is used as decimal point. Then sample file using "." as decimal point becomes error.
Then, cgview is modified so that decimal point is always "." (regardless of country setting.)

2007/6/27 Version 2.2.0
Additional functions.
o Display particle trajectory animation using trajectory file which have timing information.
(egs5-1.0.2 has not modified to output timing yet. The modification is in progress.)
o Option of "Output to file" was added in printing window.
o Error point is displayed when consistency of calculation system is checked. 
o Possibly related body for undefined point is displayed when consistency of calculation system is checked.

2008/6/18 Version 2.3.0
Additional functions.
o Calculation of Zone volume.

2009/2/9
o In the manual, variable name "imax" is changed as "maxpict".