Axiom trend zooming

It can be cumbersome to switch between cursor/zoom/annotate modes inside trends. I'm proposing some shortcuts:

1) Hold the shift key in cursor mode to zoom

2) Drag in cursor mode to measure a delta and have a zoom button appear either with the delta measurements up top or on the toolbar below

3) Hold the control key in cursor mode to annotate

The Alt shortcuts are nice but if you want to zoom once in cursor mode it requires Alt+Z to zoom, and then Alt+C to switch back to cursor. Most of the time I only want to zoom once and then go back to cursor.