Not sure what you are asking. Sounds like you are asking how to modify a dimension on a 3D model and have the Draft automatically update.
If in the Draft, double click on the drawing view and you will be taken to the model, change the dimension and then close and save the model. At this point you are returned to the Draft and you select the Update Views command and your drawing updates to reflect the model change.
i am asking if i give all dimension in 3d model then this dimension automatically reflect in 2d draft file...means no need to give dimension in 2d draft file but using one tool or something else it will automatically reflect in 3d model...
I think what is talking about is. If you place dimensions in 3D, create 2D drawing, the dimension from the 3D will show up in the 2D?
You do this in Draft after placing your views... Use the Retrieve Dimension command.
You can also use model views through Part. I don't use this way, i have used the retrieve dimensions
i used retrieve dimension command but it is not exact as i placed in 3d model. and it has two problems-
1) dimensions is repeated
2) i have to rearrange the dimensions and it takes times.