If using Mobile Web (Not the App), click HERE.
If using the App, click HERE.
Viewing all your friends on one map is easy! Here's how...
Log into your account, then click the "Little Man/profile pic" at the top of the site.
Click "View My Profile".
Click the "Friends" button under your profile picture, and then click the "Map View" icon above the list of your friends.
Now that you know how to see where all your friends are on the map, head over to the site and give it a try by clicking HERE.