When scheduling items for other GoldMine users, being able to view all their Calendars at once can help you find that free time slot.
To do this;
1. Open up your GoldMine calendar
2. Click on the "User" drop down list at the top of your Calendar
3. Select "Multiple"
4. Now you must add each user you want to view to your list here. Do this by double clicking on the usernames
5. Then hit ok.
You'll notice that GoldMine has "color coded" each users' Calendar items. Keep in mind these colors are arbitrary, and are assigned in a somewhat random order.