Is it possible to create a library type to house oligonucleotides in Signals Notebook?

Signals Notebook allows the creation of custom library types, one of the predefined options is DNA.
You can create the new library type following these steps:

    1. Navigate to System Configuration > Materials
    2. Click 'New Material Type'
    3. From the 'Type' dropdown select 'DNA' and fill in the required fields
    4. Click 'Create'

You can find additional information specific to the DNA library in the System Configuration Guide under the topic: Materials > Adding a New Material Type, in the section called Adding a New DNA/Protein Material Type Library.