Once you have created a new filter, or you have opened an existing filter, select the MARC Records panel in the Filter window.
Click the "Process data file as MARC record" check box. The dollar sign ($) will appear in the "MARC Subfield Delimiter" box, since this is the subfield delimiter in most cases. If the subfield delimiter is something other than a dollar sign, delete the dollar sign and type in the appropriate delimiter.
The reference data in a MARC reference normally starts in column 8 (that is, the sixth character from the left margin). This is the default setting you will find in the "Data starts in column" text box. If the MARC records in your data file start the actual reference data (as opposed to tags and subfield delimiters) in some other position, enter that number in the "Data starts in column" text box.
Note: Always enter a value of 6 or higher in the "Data starts in column" text box. If you enter a lesser value (for example, you enter the number 5), the value will change back to 8 when you leave the Marc Records panel even if you have saved your changes. This only happens in the "Data starts in column" text box. If you make other changes, then those values are saved when you return to the Marc Records panel.
The Accession Number is a unique number assigned to each record in a database. (The information provider’s database; not the EndNote database.) The provider may not call it an Accession Number; PubMed uses PMID, and some systems use unique identifier. These numbers sometimes appear immediately after the numeric tag, and without the two-digit subfield codes seen in other MARC fields. Since a common type of accession number often appears after the 001 tag, EndNote includes an Import 001tags as Accession Numbers check box which lets you import this number into EndNote’s Accession Number field. Accession numbers which appear in lines other than 001 often begin with a subfield, so you can set up the filter to import the number into the Accession Number field.
Normally the first character that precedes the record data is the subfield delimiter (commonly a dollar sign $). If this subfield delimiter is not present for the first field of each tagged line, you will need to tell EndNote how to interpret the first character by checking the appropriate option under the MARC records dialog. Is it part of the real data of a reference or is it a field designator (such as "a" or "b") that just happens to be missing the subfield delimiter?