Identifying layer on an XREF
Accepted solution
- Type NCOPY(enter)
- Select the xref element or multiple elements you want to identify the layer of(enter)
- Pick a basepoint and move your cursor
- Pick a second point
- Now a copy of all the the elements from your xref is part of your main drawing and here you can select the elements and check the layer easily
SALMANUL FARIS
Accepted solution
Welcome to these Forums!
If you have some variety of full AutoCAD [not LT], put this in at the command line:
(cdr (assoc 8 (entget (car (nentsel "\nSelect object for its underlying Layer: ")))))
However, be aware that this will give the deepest-nested Layer of whatever you pick on. Say you have a toilet whose parts are drawn on Layer 0, defined as a Block and inserted on a plumbing-fixture Layer into a bathroom, and the bathroom is defined as a Block and inserted on a room-layout Layer in an apartment layout, and the apartment is defined as a Block and inserted on a building-plan Layer. When you do the above and pick on some element of the toilet, it will report Layer 0 as the Layer of the object, not the plumbing-fixture Layer or the room Layer or the building-plan Layer.
Kent Cooper, AIA 
@Kent1Cooper wrote:
....
However, be aware that this will give the deepest-nested Layer of whatever you pick on. ....
You can get a listing of all the Layers of nesting of a nested object, if you need it, with this:
(defun C:RNL (/ ent nestlist); = Report Nested Layers
(if (setq ent (nentsel (strcat "\nSelect object: ")))
(progn ; then
(setq nestlist (last ent))
(cons
(cdr (assoc 8 (entget (car ent)))); Layer of object itself
(if (> (length ent) 2); nested object -- Layer(s) of what it's nested in
(mapcar '(lambda (x) (cdr (assoc 8 (entget x)))) nestlist)
); if
); cons
); progn
); if
); defun
It returns a list of Layer names, starting with the Layer the object you picked on was drawn on at its deepest level [and that's all if it's not a nested object], followed by [if it's nested] the Layer of whatever Block or Xref it's a part of, and the Layer of whatever that is nested in if applicable, all the way up to the Layer where the top-level object is Inserted/Xref'd in the current drawing. For example, I have a line drawn on a Layer called A-ELEV-HIDN [for HIDdeN-line things in interior ELEVation views], which is part of a Block that is Inserted on a Layer called A-ELEV-MEDM [for MEDiuM-weight linework for the majority of elements in the Block], in a drawing called IntElv32 [Interior Elevations for 3/8"=1'-0" scale], and that drawing is Xref'd into the current drawing on Layer 0. When I run the RNL command and pick on that hidden Line, it returns:
("IntElv32|A-ELEV-HIDN" "IntElv32|A-ELEV-MDLT" "0")
which is the Layer the Line itself was drawn on, then the Layer the Block that it's a part of is Inserted on, then the Layer that the IntElv32 drawing is Xref'd into the current drawing on.
Kent Cooper, AIA
@Amy_SchneiderJDMJT wrote:
.... Is there a way to turn this into a command by entering this into lisp. ....
Maybe you're talking about the code in Message 3, which is the one marked as an accepted solution. The one that's already turned into a command definition is in Message 7.
Kent Cooper, AIA
@Amy_SchneiderJDMJT wrote:
.... DCLRNLISTCLICKED ; error: too few arguments ....
Since there is nothing like that in my code, it must be coming from somewhere else. Did you just change the command name, and might you have accidentally tweaked something else about it? It works for me [code pasted into a drawing, not via a saved .lsp file]. Post the .lsp file you made. Or, attached is the.lsp file version of it that I made at the time -- see whether that works for you.
Kent Cooper, AIA