Issue:

How to change the logo in a digital signature in Power PDF

Resolution

You can create a new signature scheme with a custom logo. 

• In the signature panel, click on the gear and select "Create Signature Scheme". 
• Enter a Title and Description and click next. 
• Select your Digital ID and other options and click on Next. 
• Under Appearance, Click on New
• Give the new Appearance style a name and Under Configure Graphic select Imported Graphic and import the desired graphic.  Under Configure Text, uncheck Logo to remove the paper airplane graphic and Click OK.
• Click Finish to save the new signature with the new graphic