Spire.PDF 3.9.189 supports to fill signature fields with images

We're glad to announce that the hotfix version of Spire.PDF 3.9.189 is released today. With this latest update, we've added a new feature to support filling signature fields with images and fixed five bugs listed as follows.

Bug Fixes:

• Fixes the issue that Calculate action didn't work.
• Fixes the issue that the extra signature field was added into document automatically after signing signature field.
• Fixes the issue that the setting of orientation when printing didn't work.
• Fixes the issue that the values of combox field were getting lost after "Click view this version" was clicked in Adobe.
• Fixes the issue that caused the NullReferenceException when loading PDF file.