Select"Tools/
Option
"
orinput"Config"or"Op"incommandline
toopen"
Configuration
"dialoguebox,
in"drafting"
and
"selection"optioncardyoucansetthesizeofpickboxandsnapaperture.
On GstarCAD interface, select "Tools/Option" or input "Config" or "Op" in command line to open "Configuration" dialogue box, in "drafting" and "selection" option card you can set the size of pickbox and snap aperture.