How to merge 2 non-intersecting shapes into one?

Question

Adobe Illustrator

Often I see SVG icons in which there are many separate elements, but when opening them in the illustrator there is only one solid layer.
The question is how to merge 2 non-intersecting shapes in illustrator?

Answer 1

I climbed through the menu settings, found how to do it:
Select the necessary shapes, and press Ctrl + 8