We know this famous CRTL+Y shortcut , it turns the artwork in something ugly , all these wires lol.
But what is the real use fo the "outline view" ?
Thank you !
To adjust the construction of objects without the appearance getting in the way. There are many times where, due to fills and strokes, you can't see exactly where the underlying wireframes lie.
There was a time when you could only edit artwok in outline mode. Of course that was decades ago
It's an archaic throwback to the days when (believe it or not) you could not actually edit paths in so-called Preview View. In those days, you actually had to do all your editing in the completely lame Outline View. FreeHand, which put Illustrator to shame throughout its existence, never had this ridiculous limitation.
It's still around because users are habituated to its use as a workaround for Illustrator's cumbersome interface scheme in certain circumstances.
If you do any kind of computer routing (laser, waterjet, CNC router, etc) you have to know exactly what the path looks like, because the cutter does not see the stroke weight or the color fill, they just follow a path. So understanding the paths, and overlaps, knockouts etc, is absolutely necessary. For instance, if I were to unite two letters to make one object, I would like to see the Outline view to make sure that there is no path at the point where two objects were united, otherwise I would end up with two separate elements, rather than one.
If you are working on a gradient mesh and are using image template as a guide you want to work in outline preview so you can see the underlying art to determine wht you are constructing and also it then allows you to use the eyedropper to sample the color of the actual photo so it can be translated tothe mesh and you can simply switch back to Preview mode to check your progress.
Very handy when working with gradient meshes if you are using and underlying template to translate into art.
Here is a video showing the use of the preview mode to create gradient mesh art of a pepper.
it requires ptience to watch but you will learn a lot if you do not know how to do this.