How to avoid opening the reference specification box with the command "RF="
Often it may be convenient to attach a file as a reference using the keyboard command "RF=..." (when using a script for example).

After confirming this command, the "Reference attachment properties" dialog box will be displayed.

How can we avoid this?
Simply by adding after the filename 4 commas followed by a ‘#

What do these "virgulates" mean?
These are simply complementary parameters for refining the attachment of the reference:
- The name of the model to be attached if it is not the default model;
- The logical (single) name to assign to attachment
- Free description
- The name of the view:
- * : means attachment coincide
- # : means World coincide
- The scale factor to be applied to attachment
- The depth of interlocking
- An ON or OFF value to indicate whether or not the reference should be displayed
In this case, the parameter we are interested in is the 4th (diasis: #). That's why we put 4 commas without specifying anything about the first 3 of them.
Parameters 5 to 7 should not be mentioned here.
More information can be found on the MicroStation help page: click here