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Dope sheets

You can use the dope sheet view to make detailed adjustments to the keys of an individual object. You can add, copy, delete, and adjust the timing of keys in a dope sheet.
To access the dope sheet for an object, select the object, and then select the dope sheet view icon (
) on the editor panel.
Dope sheet timeline
The dope sheet timeline is synchronized with the main timeline. The minimum time value in the dope sheet is determined by the start time of the object's container on the main timeline.
Example of an object as represented in the timeline view (top) and as represented in a dope sheet (bottom)
Presentation of keys
Each key in a dope sheet is represented by a circle. The individual keys for position, rotation, and scale parameters are arranged in a hierarchy. An example of this hierarchy is shown in the following image:
Example dope sheet with keys
The top level of the hierarchy is the object - which in this example is a Wolf IFX. Each purple circle on the top row indicates that one or more parameters have a key at that point in the timeline.
Object-level keys
The next level of the hierarchy is the transform type - Position, Rotation, and Scale. A white circle in any of these rows indicates that one or more parameters of that transform type have a key at that point in the timeline.
The lowest level of the hierarchy are the individual parameters for each transform type. A circle in any of those rows indicates that there is a key for that specific parameter at that point in the timeline. In the example below, there are keys for Position.x and Position.z at 0:05, and a key for Position.y at 0:10.
Example keys in a dope sheet
Adjusting keys
The selection that you make determines which keys you adjust. When you select a circle for a key, you also select all child keys. Selected keys change color to orange. Use this to identify which keys you will adjust.
Selecting all Position keys (left) compared to selecting only the Position.x key (right)
Move: To move a key, drag it horizontally to a new position.
Delete - To delete a key, select it, and then select the delete key icon (
). You can also press delete on your keyboard.
Copy and paste - To copy a key, select it, select the copy icon (
), move the playhead to a new position, and then press the paste icon (
). You can also use the Ctrl+C and Ctrl+V keyboard shortcuts.
Selecting multiple keys
To select multiple keys on desktop devices, hold down the Shift key on the keyboard, and then click each key that you want to select. You can also click the box select icon 
, and then drag a box around the keys that you want to select.
Location of the box select icon and example of box selection in use
To turn off the box selection, select one of the other icons in the right-hand panel, such as the horizontal movement icon 
. On the dope sheet, you can move keys only horizontally.
Looping an animation
In the dope sheet, you can set an animation to loop. It will then loop between the first and last keys that you define for as long as the object is visible on the timeline.
To set an animation to loop, select the loop icon next to the object's name.
Loop setting in a dope sheet