All users can select a preferred comments shortcut.
You can specify a keyboard shortcut for leaving comments on tasks, folders, and projects.
Click your profile image in the upper right-hand corner of your workspace.
Select Settings from the drop-down.
Profile opens by default.
Scroll to the Workspace settings section and select your preferred shortcut. You have two options:
Enter to send the comment and Ctrl (Cmd) + Enter / Shift + Enter for a line break
Ctrl (Cmd) + Enter to send the comment and Enter for a line break
Click Save changes.