Thank you for filing this feature request.
To create a keyframe for selected properties, you can choose the Animation > Add Keyframe command. (The name of this command will change if you only have one property selected, ex. Add Opacity Keyframe.)
This command does not have a keyboard shortcut defined by default. However, you can assign a keyboard shortcut for it: choose Edit > Keyboard Shortcuts. More information about assigning keyboard shortcuts can be found here:
Given this information, do you still have a request for us? That is, do you want a shortcut defined by default? If so, which shortcut? (One that is already not in use by After Effects.)Bob Wolf shared this idea ·