GraphicMode
Modes to determine what and how to dispay the signature infomation.
SignDetail = 0
Default dispaly model.
Display signature details including signer,location,date,contact infomation and reason.
Diaply signature image and signature details.
SignImageOnly = 1
Only display the signature image.
Diaply sign name and signature details.
SignNameOnly = 2
Only display the sign name.