File menu > Open
Keyboard > CTRL+O
Open loads a scene file (.max file) or character file (.chr file) from an Open File dialog. You can also choose a previously opened file and use command-line options.
The .max file type is a complete scene file.
A .chr file is a character file saved with Character menu > Save Character. For more information on the .chr file format, see Character Assembly and Save Character.
If the file you're loading was created using plug-ins that are not installed, a dialog lists them. You can still load the file, but any entities in the scene that were created by the missing plug-ins are replaced with stand-ins; non-rendering boxes or placeholder modifiers. Feel free to delete these from the scene.
If the file you're loading contains bitmaps that cannot be located, a Missing Map Files dialog appears. This dialog lets you browse for the missing maps, or continue opening the file without loading them.
Note: Doors and windows are not available. In order to maintain backward compatibility, you can load .max files that have doors or windows in them from previous versions; however, you can not create doors or windows as new objects.
When Respect System Units in Files is turned on in the System Unit Setup dialog, in the System Unit Scale group, loaded files that have a different scene unit scale display a dialog that lets you rescale the loaded scene to the current scene unit scale or change the current scene unit scale to match the one in the loaded file. No conversion is done when loading files created in 3ds max 1.x.
If you rescale the file objects, the objects are scaled as if they had been created using the current scene unit scale. For example, if the current system unit scale is set to 1 unit=1 inch, and the incoming file was set to 1 unit=1 foot, a sphere with a radius of 100 feet becomes 1200 inches in radius (if the unit display is set to generic units), or 100 feet.
If you change the current system unit scale to match the one in the loaded file, the same sphere remains 100 feet in radius, the System Unit Scale setting in the System Unit Setup dialog is reset to 1 Unit=1 Foot.
If Respect System Units in Files is off, a 100-unit radius sphere that was created in a 1=1 foot system becomes a 100-inch sphere in a 1=1 inch system with a 100-unit radius.
To reopen a previously opened file:
From the bottom of the File menu, choose the file name.
You set the number of files listed by changing the Recent Files in File Menu field on the Files panel of the Customize > Preferences dialog.

The Open File dialog has standard Windows file open controls. At the right, the Thumbnail area shows a preview of the scene whose file name is highlighted in the list on the left.
Clicking the plus button appends a sequence number to the file name you entered, or increments the sequence number if the name already has one, and then opens the file of that name, if it is present.
For example, if you have highlighted a file named test00.max, clicking the plus button changes the name to test01.max and then opens test01.max.
When opening a scene created in an earlier version of 3ds max, you will see an Obsolete File dialog.

If you resave the scene, you will overwrite the file. You can still edit it using 3ds max 5, but you will no longer be able to edit it in earlier versions of the software.
Don't display this message—When turned on, you will not see the Obsolete File dialog. The dialog is also controlled by the Display Obsolete File Message switch on the Customize > Preferences > Files panel.
Note: If you need to open the scene using an earlier version of 3ds max, use File > Save As and save the file using a different name.
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