In the Add Labels dialog box, under Feature, select Note.
Select the Note label style to use.
Optionally, select a Marker Style to use. Using a Marker Style places a symbol at the Note label insertion point. If you do not select a Marker Style now, you can specify one later by editing the Label Properties.
Note: You can set up new Marker Styles from the Toolspace Settings tab. Expand the General collection Multipurpose Styles Marker Styles.
If the label style uses Referenced Text, specify the Reference Text Object Prompt Method to use.
Click Add.
Select the location in the drawing where you want to insert the note.
If the label uses Referenced Text, select the object(s) to reference by doing one of the following:
If you specified Command Line as the prompt method: Refer to the command line prompts to select the objects.
If you specified Dialog as the prompt method: The Label Properties dialog box is displayed.
Click the Value column next to the Referenced Text item (where <none> is listed). Then click and select the object from the Property Field Object dialog box.
Note: If the Visibility setting is set to True for the Referenced Text component in the label style, and you do not select an object for the reference when you insert the label, question marks (???) are inserted into the label. You can specify an object by editing the label properties.