It is okay if you have blank lines, but they should be subsequent lines of the same assembly, NOT the first line item no.  First priority is the assynum and rev columns in the spreadsheet,.   If you populate that data, in the first item number it will use that as the import record assembly number.  NOTE: If you are entering parts for different customers on the same spreadsheet you MUST enter different assynum and/or rev to distinguish between customer parts.  If assynum is same it will override customer number and use prior customer linked to that assembly number.

If the assynum and rev columns are blank in the first item no (as in item 1 in this bom) THEN the import will use the file name as the assembly number, then, if the rest of the line items have data that is the same, the system will put it on another import record with the listed number.  

Font size:  We made it larger so it is easier to read and use on things like a tablet. However, if your screen size is small it may appear too large.