@wo3dan said:

(*) create a 'Face Me' component with a circular face.
Wrap this çomponent in a new 'Face Me' component with its blue perpendicular to the inside blue. The disk will face the camera all the time...

Thanks, this is a better solution.
Small sphere is difficult to move and placed in the center.
But, math point should not be zoomed, always has the same setpoint.
Maybe in future versions to add options for using in math.

@dave r said:

I tried. You didn't say you wanted interactivity. Well I guess if you do as Cotty showed, you can get close. I don't know that I would hold my breath for adjustable line weights in SU.

Thanks in advance.
I use WinGeom, but SketchUp has much better graphics and 3D space.
Example (and interactivity):

@dave r said:

Well, SketchUp wasn't designed for this sort of thing but it can still be done. I used LayOut to create the dashed lines, the dots and the text.
...

Yeah, I know ...
LayOut is great, but there is no interactivity.
Maybe in future versions to add options for math ...

Thanks Dave R,
SketchUp has great potential in geometry but no option for the point - math point (size, color, visible ON/Off and point text(size,color,visible)) and for line-styles, line-colors and line-weights.
Others could be done through Ruby script.
I wish I could draw this image eg (in full 3D space):

Hello all,
if you can help ...
how to get a point at the corner?

I wish really point, not corner lines.

Some Plugins or similar?

And line-styles, line-colors and line-weights?

@tig said:

Does not 'match' what ??

Sorry for my English, Google translate does not translate always correctly!

2D lines is in 2D space, I need a full 3D space.
All lines should be viewed from all angles!
I try to show problems from stereometry in full 3D space, interactive.
SketchUp is a great tool for working in 3D but for use in mathematics there is no option for point, line width, line styl and color.

@tig said:

2Dtools 2D LineStyle ?

I tried.
But, does not match.

Lottery numbers ... It's easy 2,9,18,24,35, ... (€ 6.1 million )
Planimetry and stereometry (3D geometry) is a bigger problem

Thanks for your solution, component axes it was the right solution.

Maybe someone knows, how to get from a regular line dashed line? (but without smustard.com DashedLines script - I do not have Paypal). Thanks again!

Good idea thomthom, thanks!
But, not align in the center!
Am I wrong somewhere or a problem with the plugin Insert Components at CPoints?

Or, how to end of the line is this point?
How to show it Vertex with point?
Sorry for my English!