I have a question that I can't find an answer to anywhere. More precisely, I do not know how to ask such a question correctly in order to find an answer to it. I am interested in whether there is something similar in the Blender as in 3ds max? https://3dtuts.by/chem-otlichayutsya-variantyi-klonirovaniya-copy-instance-i-reference/ In a nutshell, I need to: create an object-1, create a copy of it-object 2. I want that, in the editing mode, moving the vertices of object 1, the same vertices automatically move, but in object 2. Аlso, it is very desirable that such a function extends to splines (curve) as well.
Like Brockmann said, you can create a linked duplicate of an object that shares the same mesh data block. However, if you’ve created a duplicate object with a duplicate mesh data block and wish to change it, you can also go to the mesh properties tab in the Properties editor while the duplicate object is selected, and change the mesh data block to the original one, and the two objects will be “linked.” You can even do this for objects that at first have mesh data blocks that did not come from each other.