Do FDFMerge and FDFMerge Lite support signature fields?

No. FDFMerge and FDFMerge Lite do not support signature fields. Although the Adobe Acrobat forms tool may be used to add a Signature field, it will be ignored by FDFMerge and FDFMerge Lite. Fields supported are: text, multi-text, radio buttons, checkboxes, combo and list boxes. Button fields have been supported since version 3.7.