To Edit Instrument Loop Properties

Click on an instrument belonging to the loop.
Note: By default, the entire instrument loop will be selected. To select an individual instrument in a loop, click the instrument a second time.
Select Element > Information. At the top of the dialog the Instrument Loop will be listed along with the instruments associated with it.
Select the instrument loop. The instrument loop information will display in the section underneath.
Click in the desired field(s) to change the values.
When finished, you can either close the dialog, or leave it docked for quick access.
Note: If you leave this dialog docked, you can click on various components and have immediate access to their properties.