Pro-signs are letters run together without internal spaces to mean a specific command. You write them with a line over the top.
If you have access to a printer, you can download these charts immediately. Some offer "cheat sheet" styles that include letters, numbers, and punctuation: Morse Code Chart
Whether you laminate a copy for your bug-out bag or use an interactive app for your ham radio exam, remember the golden rule: Don't read the dots—hear the song. Pro-signs are letters run together without internal spaces