New user where to begin?

Good day.
In Nvil can you use a curve as a drive rail on another curve to create a 3d shape?
https://www.youtube.com/watch?v=Wd241RpLM6U at 1 minute time frame.

Tnx!

You can use this tool, Help > Contents > Modeling > Vertex Section > Spline Vertex > Spline Slide.

Hello
anyone can explain me how to import curves from another program?
there is no import like other programs...I see import from external file which is vmw files...

clipboard has fbx and obj.

is dxf possible? svg?

I need to work with exact measurements for cnc fabrication.

Tnx!

dxf is supported. Edit > Options > File Format options > Formats > dxf.

File > Open Scene > Pick your dxf file.

Hello what would be the proper way to create a line as the red one just above an existing line?
If I had a circulized item I just can inset and it will create a perfect ouline...but how to do this with something like half a circle?

Tnx.

Use this Edge-Loop Split-Slide tool, https://youtu.be/tDuQplQrq5E

Tnx...
I am with this about 2 hours...with the reference image.
I am sure I have asked this before but cannot find it...in the forums.
When you try to align reference images at some point they disappear...when you cross the middle point I guess.
Why is that?
Is there a way to avoid this..or not having it disappear? this confuses the hell out of me.
In the left view I see the image, in the right view I dont....
The only other 3d app I use is Moi3d and here it is very quick you can move it never disappears...if you have an image visible in the top view
and in the 3d view you move it closer and farther away you will still see it in the top view and bottom view as well.
I am sure there is a logical explanation but I am not understanding this.

and why when I create a box it wraps is with my reference images?

Tnx!

* You can create an image plane for the right view. Or you can put the image plane in the middle so it can be visible from both left/right direction.

* The box used the same material as the image plane. You can create a new material and assign it to the box. View > Windows > Materials Window.