You can access the Keynote Legend tool by clicking View tab
Create panelLegends drop-down
(Keynote Legend). There are 2 parameters predefined in the Scheduled fields list: Key Value and Keynote Text. The remaining tabs (Filter, Sorting/Grouping, Formatting, and Appearance) are all available as they are for other schedules. See Specifying Schedule Properties.
With careful use of keynote headings and filtering, it is possible to create keynote legends that group common types of keynotes together.
Keynote legends can be placed on multiple sheet views.