In the Graph Editor, select Edit > Transformation Tools > Move Keys Tool to manipulate groups of keys (proportionally or in relation to a selected key) using the Move Keys Tool.
Note: The Move Tool’s Move Key Settings are only available when the Graph Editor is active.
Select Edit > Transformation Tools > Move Keys Tool > 
to open the Move Key Settings:
- Move Option
-
Select from the following:
- Move Only disables the tool’s ability to sweep throughout a curve’s keys (see Move Over, below).
- Move Over (default) lets the tool sweep through an active curve along the curve’s keys. This expedites the fine-tuning of animation curves.
- Move Falloff
-
Set one of the following options:
- Constant moves all keys the same amount in the direction you
-drag. - Linear moves all keys based on the distance they are from the mouse down location. The amount a key moves decreases linearly as its distance from the mouse down location increases.
- Exponential moves all keys based on the distance-squared they are from the mouse down location. The amount a key moves decreases exponentially as its distance from the mouse down location increases.
- Constant moves all keys the same amount in the direction you