You can export text from a sticky note to create a text file.
Click the sticky note that contains the text you want to export.
Choose File > Export Text.
Type a name and choose a destination for the text file you’re creating.
Choose a format from the Format pop-up menu:
Plain Text: Cannot include paragraph and font formatting or graphics and other embedded files.
RTF: Can include paragraph and font formatting. If you add graphics to a Rich Text Format (RTF) file, it is changed to a Rich Text Format Directory (RTFD) file.
RTFD: Can include paragraph and font formatting, as well as graphics and other embedded files.