Open the 3D viewer from the navigation menu.
Move around in the model until you have the screen view you want to create a bookmark off and
When you are ready click on take snapshot.
Add a description (optional)
If you want you can make a description of the bookmark that is optional and then you choose if the bookmark should be private or be visible for all members in the project. Then press the create button, and the bookmark is created.
You can choose to share or not your "private bookmark / share with the project"
Models and revisions
You have two options: either to always "follow the latest revision" of your selected models or to permanently lock the bookmark to these current revisions "Lock to original revisions".