Question

I could have sworn I’ve seen a video showing how to set the padding for an element for the left,right,bottom,top all at once with a keyboard shortcut to a single value but I can’t find it or remember how. So how do I set the padding for an element to “5” for all sides at once in the property window?

The resulting xaml should be:

 Padding="5"

Answer 1

At the right side of the properties there should be a small box. Hovering mouse reveals tooltip saying “Advanced options”. Click on it and a menu will appear. Choose “Custom Expressions…” and enter a single value. The value will be applied to all sides of property

I don’t have enough reputation to post image, but here’s a screeenshot

Actually, anything entered will be written to the XAML as-is. For example entering 5,2 would set the left and right padding to 5 with top and bottom padding to 2. The XAML result is padding="5,2". It is possible to enter {Binding} and other expression as well.

[Personal Rant]
I found this after being frustrated by Blend by just how unobvious it is to set all sides of thickness-type property (i believe the type of margin, padding, etc is called thickness) at once, even thought it should be common action. It doesn’t involve keyboard shortcut, but i believe it’s an acceptable solution for the problem (setting all sides of thickness property). And although my answer is late, i hope it help someone in the future