BACKDROP

Purpose:

This function is used to define any 2D view that is a Level 1 subpicture, as a backdrop.

Instructions:

1. In Tools menu, click Backdrop.

2. Indicate the 2D structure to use as backdrop. The system responds with simple graphics dialog in which you can choose projection for the backdrop.

3. The next prompt is 'Cursor position'. Indicate point to be referred to model space. (2D point mode toolbars are available). Key in X, Y and Z. coordinates.

4. Finally, the current scale is fetched from the view, presented to the user and made possible to update in case not correct. Thus the backdrop will be connected to specific location in the model space with defined projection.

Options:

None.

Result:

The subpicture will be recognized by the system as an ordinary model view.