Create sketch on top of 3d sketch?

[eboas2JMKU]

Hi! Is it possible to create a 2d sketch on top of a 3d sketch? I'm new to AutoCAD and haven't figured out how to do this. I want the area in green in the attached image to be the base of my new sketch. Thank you!

[Patchy]

UCS, W

then draw on top of it.

[paullimapa]

Quickest way is to Layer freeze everything else leaving just the green area. Then use Plot command select device like PublishToWeb Jpg.pc3 or Dwg to Pdf.pc3 and window that area to output the digital file.

Then ImageAttach or PDFAttach it back into AutoCAD then you have a 2d image to sketch on top of.

Otherwise, you'll have to learn how to use Layouts and Paperspace to create a Vport with Hidden property and then you can sketch on top in Paperspace.

[tramber]

My answer is different (because there are plenty of ways) :

Use polylines !

If you don't stick to an elevation pleased to a first point specification on a 3D corner, then it is because you don't know the point filters, wich the most useful and important concept together with the fact that a polyline remains parallel to the UCS plane, wherever you click.

Two many informations ? 😎

No, only two 😅 (against about hundred)

Good luck

[changmarin]

What I do is create a layout with the 3D view of my choice and trace it.

[rlpgmlo]

Try using 3DPOLY or PL command.

[TheCADnoob]

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@eboas2JMKU wrote:

Hi! Is it possible to create a 2d sketch on top of a 3d sketch? I'm new to AutoCAD and haven't figured out how to do this. I want the area in green in the attached image to be the base of my new sketch. Thank you!

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If I understand you correctly, I think you have a misconception about how to go about drawings in AutoCAD. The best way to think about it is that AutoCAD is generally always in 3D space. Any 2D representations are just 3D drawings without any elevations. 

So to draw a new 2D sketch on top on your 3D sketch, you just have to draw all your new geometry with an elevation. instead of a line beginning at (0,0,0) it will begin at (0,0,10). Now you can change a UCS so that AutoCAD treats (0,0,10) as though its at (0,0,0). 

AutoCAD is different than some parametric modelers where you define your sketch plane prior to sketching, but you can change your UCS to mimic that behavior. 

[changmarin]

When I discovered osnapz variable it was a breakthrough for me; actually it was taught to me.  Combined with UCS  Z origin great work can be accomplished.

[TheCADnoob]

Awesome, glad its working out for you.