The 676 has 4 activity buttons at the top. The first 3 (from left to right) can be mapped to any single activity using the "Customize Activity Buttons" feature. On the Client Software interface, click Activity, then click the "Customize Activity Buttons" tab (next to the "Add Activity" tab. On the website interface: Click the "Customize Activity Buttons" tab at the top right of the Activities column. You could map the "Watch TV without surround" activity to the Green (TV) activity button, and map the "Watch TV with surround" activity to the Blue or Red activity button.

The last activity button at the top right of the remote (with a star) is the "More Activities" button which displays all activities on the LCD. You then select the desired activity by pressing the corresponding LCD key.