Replace z-value with current elevation

[nextvkin]

In full autocad there is an option for replacing the z-value with the current elevation, so that when a drawing from the surveyor for example is xrefed in we're not drawing 3d lines. I can't find this option in LT where it's really needed - LT is basically for 2D I would have thought!

[tedg]

I don't know if this is what you mean or if it works in LT, but in AutoCAD, the command "elevation" is where you can set your working z value.

So if you want your elevation to be 2000', just type "elevation" > "2000'".

[cadtag]

OSNAPZ maybe? turning that on ignoires the Z value when using Osnaps

[nextvkin]

Ted, what I want is to set Elevation to 0 and no matter what z-value I snap to it always draws at z-value =0. This works in Full Autocad by selecting the Replace z-value with current elevation (in Options drafting tab) or as Cadtag suggests Osnapz = 1. However neither of these is available in AcadLT. Just wodering if there's something else that would do it. Thanks.

[cadtag]

can you select objects, and set Z=0 in Properties? or is that missing/greyed out?

[nextvkin]

Cadtag, yes I can do that alright, but it's the prevention I'm looking for not the cure - in other words, in full ACAD have the option replace z-value to current elevation & set current elevation to 0, I just draw as per normal & snapping to any z-value will still let me draw at elevation 0. I just can't find this option in ACADLT. In ACADLT even when I set the elevation to 0, when I snap to any z-value it'll draw at that z-value, resulting in lines that are all over the place (in z-values & then I'll have to fix them.

[cadtag]

Bricscad probably a better choice for you than lt. At least it is not deliberately broken by the mfgr

[zcardwel]

Can you use the FLATTEN command in ACAD LT?

[hardin]

Well, it's not pretty and won't work with running OSNAPs, but you could develop a tool bar or tool palette to snap to things with elevation of 0 by using point filters.
Doing this manually, the command line looks like this:

Specify first point:
Specify next point or [Undo]: .z
of 0,0,0
(need XY): endp of

So your macro or toolbar button would look like this:
.z 0,0,0 endp

Of course your snap would be any snap you wanted. You could duplicate AutoCAD's default SNAP tool bar with these osnap macros.
I suppose you could also just make a button with the ".z 0,0,0" then choose the snap of choice. But who wants to do two clicks when you can do just one?

Otherwise, you'll just have to FLATTEN the drawing (if that's even available in LT) or use CHANGE and the Properties Manager to keep things at 0.

[ntaylor103650]

If you're trying to snap to 3D points in the xref, and all you want is 2D (at some specified elevation), then draw a 2D- or LW-polyline. Each vertex after the initial vertex will have the elevation of the initial. Two options here: either set the initial elevation using a point filter, or edit the elevation in Properties when done.