Lets you reload, detach, or bind a linked file.
The Reload, Detach, and Bind buttons are available only when you have highlighted a particular file in the Linked Files list.
- Linked files list
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Lists linked files. The File Link Manager displays an icon next to the path name of each linked file. The icon reflects the status of the linked file:
The linked file hasn't changed, and there are no errors. 
The linked file can't be found at the specified location. 
The linked file has changed, or another file has been selected by changing the path or using the browser from this list. If you want to update your scene with the changes in this file, you must reload your link. You can change the path name by highlighting it and clicking again to enter a new location. Clicking the path twice also displays a
file browser button to the right of the file name. Click this to locate a file using a file Open dialog. If the directory of a linked file is no longer valid, then you must enter a new, valid path name. - Reload
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Click to refresh the link between the file and the 3ds Max session. Reload is useful when the original file has been modified and you want to see the changes reflected in your 3ds Max scene.
- Show Reload options When this is on, clicking Reload opens either the File Link Settings: DWG Files dialog or the File Link Settings: Revit Files (RVT or FBX) dialog, depending on the file type. In this dialog, you can change the settings used to link the file (some initial settings can’t be changed). When off, Reload relinks the file using the current link settings. Default=on.
Note: Changes that have been made to the base file are applied to the objects at the bottom of the 3ds Max modifier stack. In other words, the local 3ds Max modifiers are not changed. If you have 3ds Max materials applied to walls in a floor plan in your scene, the same materials are applied to the walls when you reload an updated version of the linked file.To cancel the Reload, press Esc. You can do this at any time during the process. Cancelling the Reload removes every object the process has linked to the scene up to the moment you press Esc.
- Detach
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Click to removes an existing link to a file. Detach also removes all geometry associated with or dependent on the link.
When you click Detach, 3ds Max displays a warning that you're about to remove all objects associated with the linked file. You can either proceed or cancel the operation.
- Bind
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Click to remove the link to the file, but retain the geometry in your 3ds Max scene. The geometry is no longer linked back to the original file, and if the original file changes, you can no longer update the geometry by using Reload.
When you click Bind, 3ds Max displays a warning that you’re about to break the link between the objects in the current 3ds Max scene and the original file.