When I export my diagrams as a .png it does not have a background color, and reflects the background color of the viewer.
This is a known limitation that has been reported to our Product Managers. If you are affected by this limitation and want to be kept up to date about this feature request, please create a ticket in our Support Portal and reference this knowledge base article.
KBA , BPI-SIG-CA-INT-PDF , PDF Import / Export for SAP Signavio , Product Enhancement
SAP Signavio Process Manager all versions ; Signavio Process Manager all versions