To delete keyframes at the current time:
-  In the Transport Controls window, move the Timeline indicator to the keyframe you want to delete. 
 
- Click Delete in the Key Controls window. 

Keyframe buttons A. Delete button unavailable when there is no key at current time B. Delete button available
 
  
To delete a selected keyframe:
- Click or drag around a keyframe to select it. 
 
- Press Delete to delete the selected keyframe. 
Tip: You can also right-click the timeline and select Delete from the context menu. 
  
To delete keyframe regions:
-  Ctrl-click multiple keyframes or drag around a number of keyframes to select them. 
 
- Press Delete to delete the selected keyframe region. 
Tip: You can also right-click the timeline and select Delete from the context menu.