Edit menu

Undo, Redo, Repeat, Recent Commands List

To...	Do this
Undo the last action.	Select Edit > Undo or press Ctrl+Z.
Redo the last action.	Select Edit > Redo or press Ctrl + Y.
Repeat the last command.	Select Edit > Repeat or press G. You can also middle-click a menu name to repeat the last command you chose from it.
Repeat a recent command.	Select Edit > Recent Commands List to show a list of recent commands. Hold the space bar to open the hotbox and press the left mouse button in the Recent Commands area on the left to show a menu of recent commands.

Keys

Options in this submenu let you perform editing operations (cut, cut, paste, and so on) on the selected keys.

For more information about the options, see Key menu.

Delete

Delete

Deletes the current selection.

Delete By Type menu

The options in this submenu let you delete each object of a certain type in the scene.

For more information about the options, see Delete by Type menu.

Delete All by Type

The items in this submenu let you delete every object of a certain type in the scene.

See also Delete.

Duplicate

Duplicate

Creates a single copy of the selection. You can also press Ctrl+D.

See also Duplicate.

Duplicate Special

Creates one or more duplicates of the selection, optionally with transformations applied to each duplicate. You can also press Ctrl+Shift+D.

Select Edit > Duplicate Special > to set the Duplicate Special Options.

Duplicate with Transform

Duplicates the selection and applies the last transformation you did with the current manipulator. You can also press Shift+D.

If you do a transform and then make the manipulator go away (for example, but deselecting the object), Maya forgets the last transformation. See also Duplicate.

Transfer Attribute Values

Populates the attribute values of one object (the target) with the attribute values of another (the source) for all identically named attributes that the source and target share, over all frames in the timeline.

Select Edit > Transfer Attribute Values > to set the Transfer Attribute Value Options.

Hierarchy

Group

Groups objects together under a new empty Transform node, allowing you to select and transform them all at once. You can also press Ctrl+G to create a group.

Select Edit > Group > to set the Group Options.

See DAG Hierarchy for more information on Transform nodes.

Ungroup

Ungroups the objects under a group node.

Select Edit > Ungroup > to set the Ungroup Options.

Note: Don't use Edit > Ungroup on Level of Detail groups; the LOD threshold information isn't reset properly on Undo. Use Edit > Level of Detail > Ungroup to properly ungroup an lodGroup node.

Create LOD Group

Creates a Level of Detail group, which associates multiple different resolution versions of the same geometry that you want to be replaced based on camera distance in a game engine. This lets you produce a high-quality version of a model for up-close and a low-quality version for far-away, with multiple versions in between. See also LOD (Levels of Detail).

Select Edit > LOD (Level of Detail) > Create LOD Group > to specify the following before you create the group:

Threshold Type

Specifies the method to use when determining which level of detail to display.

By default, Threshold Type is set to Screen Height Percentage so that levels display based on the percentage of screen height taken up by the overall LOD group in the current camera frame. Screen Height Percentage measures the overall height of all the meshes in the LOD group relative to the current camera frame, and establishes an initial default percentage for each level to display. You can also set the threshold to switch based on Distance from the camera.

When you export the selected geometry using FBX, this setting is stored in the FBX file so that it can be read by your game engine. (See also Export LOD groups to your game engine.)

Generate LOD Meshes

Generates lower resolution versions of a selected high resolution mesh, and adds them as new levels in an LOD group. See also Generate LOD meshes.

Select Edit > LOD (Level of Detail) > Generate LOD Meshes > to open the Generate LOD Meshes Options and specify the settings used to generate meshes.

Ungroup LOD Group

Ungroups a selected LOD group.

Parent

Makes the selected nodes children of the last node you selected (the key object). Select the objects you want to assign to the parent, then Shift-select the parent and select Edit > Parent or press P. That is, if two objects are selected in sequence, the first selected object becomes a child of the second selected object.

The child objects remain selected after the parent operation is completed, and the parent object is deselected.

When you select the parent, the children are also selected, and the parent's Transform node controls the children's transformations - see DAG Hierarchy for more information on Transform nodes.

Unparent

Unparents the selected object. You can also press Shift+P.

Select Edit > Parent > to set the Unparent Options.