To edit the title, enter characters on the keyboard. While the title field is selected, the &up; and &down; buttons change the priority. Use the &left; and &right; buttons to move the cursor.
To edit text in the todo message field, simply enter characters on the virtual keyboard as you would on a normal keyboard. Use the d-pad to move the cursor around. The spl button switches keyboards to special character entry mode. This is useful for foreign langauge character entry. To jump between fields, use the &l; and &r; buttons or press enter. The clear button clears all fields and the delete button removes the todo entry from your card.