Click on "Machines/Methods", then "Edit Procedures".
A list of existing procedures for which you have edit access are displayed in a table.
In the "Actions" column of the table click the "Edit" button in the row of the procedure you wish to edit. To filter the list to locate a particular machine/method, type keywords in the table search bar.
Make any required modifications to the procedure title or description.
Beware: this will change the procedure for all machines/methods associated with the procedure. If this is not desired consider editing the machines associated with the procedure before editing the procedure itself.
Save any modifications by clicking the "Save Changes" button at the bottom of the page.