Work with files
In addition to saving and opening model .3dm files, Rhino can also open and save a large number of file formats created by other software.
For a list of supported file formats, see: Index of import/export file types.
Open a model or create a new model
![Toolbar: File | Standard](../image/command_icons/new.png)
New
Create a new model based on a template.
![Toolbar: File | Standard | STL Tools](../image/command_icons/open.png)
Open
Opens an existing model file.
![Toolbar: File | Standard | STL Tools](../image/command_icons/import_rt.png)
Import
Merges objects from another model file.
![Toolbars: Block | File](../image/command_icons/insert.png)
Insert
Insert block objects stored in the file or import a file as a block definition.
Save or export a model
![Toolbar: File](../image/command_icons/autosave.png)
Autosave
Save the current model to a backup file.
![Toolbar: File](../image/command_icons/incrementalsave.png)
IncrementalSave
Save sequentially-numbered versions of a model.
![Toolbar: File](../image/command_icons/revert.png)
Revert
Discard changes and revert to the previously saved document.
![Toolbar: File | Popup | Standard | STL Tools](../image/command_icons/save.png)
Save
Save the current model.
![Toolbar: File | Popup | STL Tools](../image/command_icons/saveas.png)
SaveAs
Save the current model with a different name, close the current model, and open the new model.
![Toolbar: File](../image/command_icons/saveastemplate_rt.png)
SaveAsTemplate
Save the current model as a template file.
![Toolbar: File](../image/command_icons/savesmall.png)
SaveSmall
Save geometry objects without render or analysis meshes.
Automatic back up
Automatically backup upon save.
![Toolbar: Popup](../image/command_icons/export.png)
Export
Save selected objects to a new file.
![Toolbar: Block | File](../image/command_icons/exportwithorigin_rt.png)
ExportWithOrigin
Save objects to a new file with a specified origin and construction plane.
Use worksessions
![Toolbar: Worksession](../image/command_icons/worksession.png)
Worksession
Manage a list of models that can be used as reference geometry.
![Toolbar: Worksession](../image/command_icons/limitreferencemodel.png)
LimitReferenceModel
Limit the amount of reference geometry that is available to work on.
Check files for errors
![Toolbar: Diagnostics](../image/command_icons/audit.png)
Audit
Checks the current Rhino model for errors.
![Toolbar: Diagnostics](../image/command_icons/audit3dmfile.png)
Audit3dmFile
Checks a Rhino 3dm file which is not currently opened for errors and lists the contents.
![Toolbar: Diagnostics | Tools | Utilities](../image/command_icons/rescue3dmfile.png)
Rescue3dmFile
Recovers geometry objects that can be read from a damaged Rhino 3dm file.