You can attach a DWF file as an underlay to a drawing file.
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DWF underlay files are referenced and placed in drawing files the same as raster image files; they are not actually part of the drawing file. Like raster files, the DWF underlay is linked to the drawing file through a path name. Linked DWF paths can be changed or removed at any time. By attaching DWF underlays using linked DWF paths, you can use DWF files in your drawing without greatly increasing the drawing file size.
You can also drag DWF underlays directly into the drawing. Once you drag the DWF file into the drawing, you are prompted to enter a sheet name from the DWF file at the command prompt. You then specify an insertion point, scale factor, and rotation.
Once you've attached a DWF underlay, you can reattach it multiple times, treating it as a block. Each underlay has its own clip boundary and its own settings for contrast, fade, and monochrome. However, you cannot bind the underlay to the drawing and you cannot edit or modify the underlayâ€™s drawing content.
When a DWF file is attached as an underlay, any layer structure it may have is flattened into a single layer. The underlay is placed on the current drawing layer.
If you work with drawings that have DWG references (xrefs), there is a chance that one of the DWG references may have a DWF underlay attached. In this situation, the DWF geometry will be visible in the parent drawing.
For example, Drawing A includes a DWF underlay showing some mechanical details. You need the content of Drawing A attached to your current drawing, Drawing B. If you attach Drawing A as an external reference to Drawing B, the DWF underlay that was already attached to Drawing A will also be present.
All of the property settings made to the underlay in the DWG reference, such as clipping boundaries, will appear as they do in the parent drawing.
If a DWF file you want to attach as an underlay is password protected, you will be prompted to enter the password after youâ€™ve selected the file. You will not be able to complete the attachment until you have correctly entered the password.
Once a DWF underlay is attached to a DWG, you will be prompted for the DWF fileâ€™s password when you open the DWG in the future. If the DWG file is also password protected, or has several other protected drawing references attached, you may be prompted for multiple passwords.
Should you choose to redirect the path of a DWF underlay to a DWF file that requires a password, you will be prompted for a password.