when scene view is zooming in or out.how to make an geometry or objet keep its size in pixel?

wish somebody can understand what i said.

Do you mean this?

http://en.wikipedia.org/wiki/Dolly_zoom [en.wikipedia.org]

Not from the scene view, but with a camera you should be able to rig up a means to measure the distance from the camera to an object (in chops) and use that.

thanks you.
it is what i want.

Oh I see what you mean. You posted a similar question a while back?

http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=14014&highlight=Hitchcock [sidefx.com]

You want to be able to have your objects visible even if they are far away?

I think in Max you get a little icon if you group stuff or make a model, if I remember correctly…

In Houdini the gnomons always stay the same size. You can also hit d and switch on “Object names”. That will display the names of the objects in your scene, always the same size.

Sorry that's the only build-in thing I can think of.

yes..thanks for your help.
despite all this,but I l think I have already learn some new thing.