Sony PlayStation Portable PSP-1003 K - Manual (Page 106)

106 How to use the keyboard
You can use the on-screen keyboard for text entry such as when entering a
nickname for the PSP™ system or entering network setting information.
Control panel item list
* This key is displayed only when two or more lines can be entered.
How to use the keyboard
Keyboard keys Function
Enters a space
Confirms characters that have been typed but not entered, and
exits the keyboard
Cancels characters that have been typed but not entered, and
exits the keyboard
Moves the cursor
Deletes the character to the left of the cursor
Displays a diagram showing the system buttons and their usage
Switches between upper and lower case
Enters a line break*
Function keys Cursor
Text entry field (Displays
characters as they are entered)
Alphabet/symbol keys Input mode display