Microsoft Visio 2013 how to resize an object and maintain its aspect ratio?

I'm using Visio 2013. I dragged and dropped a PNG image onto the drawing surface. I click on the image and the resize handles are displayed at each corner and a rotation handle is displayed at the top.

I simply want to resize the image and maintain its aspect ratio (I don't want any image distortion). I've tried using the Shift key when grabbing the corner handles, but it doesn't seem to preserve the aspect ratio when resizing. I'm surprised because this convention works in other office apps like PowerPoint.

I opened up the "Size & Position" tool window so I can edit the size directly, but without my doing the math, it seems I can't require resizing to maintain the aspect ratio.

What am I missing? There must be an easy way in Visio to resize objects and maintain their aspect ratio. Is there some mode or setting I'm missing?

4 Answers

Looks like there is a protection feature set that includes an Aspect Ratio option. You'll need to run in Developer mode and then you'll get some extra options. Check out the Office support article with instructions here:

Use the Shift key like you tried, but use the handles on one of the sides instead of a corner. I'm not sure why ratio is kept via side handles but not corners, but that's how it's working for me.

In Visio you do not need to hold the shift key down. Just drag a corner and it sizes the object and constrains proportions.

Alternative solution which I've been using and teaching for years: CTRL and corner handles in Visio. SHIFT and corner handles in other MS Office software.