... I mean the selected surface -> edge

Hi s7r83dg3,

> ... I mean the selected surface -> edge

Do you mean you want to extract the edges of a surface as regular curve objects that are independent from the surface?

You can do that by using Copy + Paste when the edges are selected.

You can also use "Select All" as a quick way to get all the edges of a surface selected - first select one edge by the regular method of a second click on it. That's where the first click selects the "whole object" and then the second click can drill-down to select sub-objects like edges or faces.

Then once one edge is selected use Ctrl+A (or the "Sel all" button on the Select tools section of the side pane) - that will select all other edges and now you are ready to do a Ctrl+C Copy and then a Ctrl+V paste to duplicate them as individual separate objects.

Then delete the surface if you don't want it anymore and just want the edge curves.

- Michael

Almost ... I want to select a surface of a volume
object and then convert the selection into
only the edges of this specific surface.
ctrl-a will select all edges of all surfaces of
the entire volume ...

Hi s7r83dg3, to do one surface out of a volume, select that surface with the "drill-in" selection (you may need to zoom in a bit so you can do the second click on an area on the surface that is not nearby an edge), then use the Edit > Separate command to break that surface away from the main object, then do the steps that I wrote previously on the new separated part.

Also after you do the Ctrl+C to copy the edge curves to the clipboard, you can use Undo to undo the separation part, then use Ctrl+V after you are back to the original object after the undo.


Also if you don't have too many edges you can just select whatever edges you want to copy individually or with a window selection instead of Ctrl+A.

- Michael

Also another edge selecting method that may be helpful for your case is the new loop selection option that was added in the last beta: