用写字板打开后找到下面这段话:
# If you don't want users to have their sketchbook default to
# "My Documents/Processing" on Windows and "Documents/Processing" on OS X,
# set this to another path that will be used by default.
# Note that this path must exist already otherwise it won't see
# the sketchbook folder, and will instead assume the sketchbook
# has gone missing, and that it should instead use the default.