I've been asked to raise this here, after raising it as a defect in issue 
51149.  Personally I think the default action is wrong, but either way it 
needs documenting.

When resizing a graphic, if you drag a corner you can change the 
vertical/horizontal ratio.  To keep the ratio, you have to hold down the Shift 
key.  It needs to be the left shift, as right shift will activate FilterKeys 
after 8 seconds.

Microsoft Word always keeps the ratio, unless you deliberately drag the middle 
of a side.  This seems far more logical, as it's a PITA to have changed the 
ratio when you didn't intend to.

I think the default should be to keep the ratio, and use the shift key to 
unlock the ratio.

Failing that, there needs to be a tooltip that appears when hovering over a 
corner, saying "press Shift to Keep Ratio".

I can't think why anyone would need to unlock the ratio - it's generally 
easier to drag one side to fit the column width, then drag bottom to give the 
required height.  It's annoying to find you have accidentally changed the 
shape.  I'm sure this was covered in CLAIT or ECDL training, using the 
Microsoft method.

In the right-click "Position and Size" window, there is a box for "Keep Ratio" 
but it won't stay ticked when the window is closed.  Maybe this window would 
be an appropriate place to display a note "To keep ratio while dragging 
corner, hold the left Shift key."