How to do the zoom in detail (enlarge on portion of the area to certain scale)?

Question

How to do the zoom in detai l (enlarge on portion of the area to certain scale)? 
 For example, I have a gas line in the 1"=200' exhibit, I want to enlarge only (zoom in) that gas line in a scale of 1"=40'. How do I do it ?

Lorys · Answer

what version msnt? 
 are you using sheet models? 
 Are you using annotation scale in your model settings? 
 do you just want a view in the model to be that scale or a finished drawing detail either in model or sheet? 
 Do you know how to make a saved view by 2 points, then you can ref that save view just like a view port in acad on the sheet or in the model itself.. 
 we need a lot more info to help you exactly.

Matthias Heise · Answer

Hi Minhdang, I was looking for the same like you (I suppose :-)). I found something like this: I select the element and fit the view to select element and change the annotation scale in the same time. I created some icons for it and used different combinations for the settings:
set displayset on;selview 1;displayset set selection;fit all;point ab;displayset clear;update view extended;model set annotationscale 150