If you use the interactive command line, the regular "p4 change" command is the way:
p4 change
This opens the changelist specification in the editor so you can fill it out and saves the changelist when you save the file in your editor and exit it.
, "p4 change -i", , stdin. "p4 change -o" , "p4 change" ( stdout ), , , / , , -field:
p4 --field "Description=My pending change" change -o | p4 change -i
, , , "":
p4 --field "Description=My pending change" --field "Files=" change -o | p4 change -i