Questions on scaling

I have two question concerning scaling:

  1. Whenever I import a VRML file that was created in another modeller, I never know what the size of the object will be in Blender. Are there any “rules of thumb” regarding dimension or units of the original file and how this is translated into Blender?

  2. How can I dynamically scale a group of objects? Even if I make multiple selections it seems that only the “active” object is scaled.

  1. it depends on the program that created the VRML

  2. try scaling outside of edit mode.

Martin