DWG Open Options, Advanced

Contains controls that are used to set advanced options for opening DWG and DXF files.

DWG Open Options, Advanced

Use Seed File Global Origin

When on, uses the global origin from the DGN seed file (specified under the Basic DWG Open Options). Use this option if the DWG file originated from a DGN file, and you plan to save the file as a DGN file.

Set Axis Lock if OrthoMode=1

When on, turns on Axis Lock if the AutoCAD ORTHOMODE system variable is set to 1 in the DWG file.

In AutoCAD, the ORTHOMODE system variable constrains the cursor to move only horizontally and vertically. It is analogous to the Axis Lock setting in MicroStation.

If you would rather work with AccuDraw instead of using Axis Lock, turn this setting off.

Map Logical Names to XRef Block Names

When on, the XRef block names are used for reference logical names in MicroStation.

In AutoCAD, each XRef is assigned a block name. This name is typically, but not necessarily, the name of the XRef file.

Display Units Alert

Identifies when the DWG/DXF Units alert box is displayed.

To determine the true size of geometry within a file, MicroStation must know the linear units used in the file. Unlike DGN files, DWG and DXF files often do not have explicitly specified units. When you open a DWG file without specified units, MicroStation displays an alert box that asks you to select the file units. This alert box can be enabled or disabled for each of the following scenarios. You can also disable it by turning on Do Not Display Again.

Display Units Alert > Unspecified Design Center Units

If on, the units alert box is displayed if Design Center Units are selected in the Basic DWG Open Options, but the file being opened has Design Center Units set to Unspecified.

Display Units Alert > Decimal, Fractional, or Engineering Units

If on, the units alert box is displayed if the file being opened has Decimal, Fractional, or Scientific units. These unit settings do not imply any particular units, although meters are typically assumed.

Display Units Alert > Mismatched Engineering or Architectural Units

If on, the units alert box is displayed if the file being opened has Engineering or Architectural units, but the unit setting is not set to Inches. Since these file types strongly imply that inches are used, any other setting is likely to be an error.