global(for whole scene) control for displaying edges?

Blender newb here. Anyone else need a global switch for ‘Display wire/edges’ – on top of solid mode? at the moment i think the only way to display wire on top of solid mode is to enable in object properties (so you have go and change for every single object in the scene which is extremely tedious!) On a complex mesh/scene everything can blend into single(or 2/3) shade(s) of grey which can make it difficult to see the outlines. 2 additional GLOBAL DISPLAY modes would be very helpful – ‘display edges’ and ‘draw all edges’.

It would be most appreciated if any experienced users know of a workaround (by that i don’t mean complex lighting setups – at the moment i assign different materials and colours).

Or maybe nobody else is having the same problem….

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