[Brian Thomas] ” Oh well, I can always make a feature request…
“
Yes, currently there isn’t a command to exclusively “Add keyframe to all transform points at playhead”.
Another way to do this is to press shift-t to enter the transform mode (or right click the Viewer and choose “Transform” from the drop down) and then hit the add keyframe button in the Viewer HUD. Then move down the timeline and make your adjustment in the transform window (or inspector).
Select the arrow tool to get out of Transform mode (or click “Done”, or right click in the viewer and choose “None”).