Summarize this article in one sentence.
Navigate through your Box folders by clicking on them until you see the folder you want to use as your collaboration folder. All the files and folders under this folder will share the same collaboration settings. On the far-right side of the files and folders in your view, click on the small box with the downward arrow to bring up the "More" options. Select "Share" and then "Invite Collaborators" from the sub-menu. A pop-up window will appear. On this window, enter the names or email addresses of the people you want to invite as collaborators in this folder. People you invite to be collaborators need to have their own Box accounts as well. After inputting the collaborators, you need to set their access levels. Click on the drop-down list to select among "Editor," "Viewer," "Co-owner," "Viewer Uploader," "Previewer Uploader," "Previewer," and "Uploader." Each of these access levels have predefined actions that they can execute on the collaboration folder. An Editor can add, edit, and delete contents on the file while a Viewer can only see the files but cannot change them. The last thing you can do on the pop-up window before sending out the invite is to include a message. This is a free text field, so you may write anything. Click on the "Send" button to send your invite to those names or email addresses you included in the invitation. After you've sent out the invite, the folder icon changes from the default yellow folder to a blue folder; this clearly indicates that it as a collaboration folder.

Summary:
Identify the folder. Invite collaborators. Set permissions. Type a message. Send your invite. Notice the collaboration folder.