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Laura Boyd 18Laura Boyd 18 

Lightning Action displaying dialog box

Hi,

I am reasonably new to Visualforce so bear with.

I have a lightning action on a custom object (called PO Records). This lightning action calls a VF page, which in turn has an action / extension in it which generates and saves a PDF to the custom object.

This part works fine, but when the button is pressed I get a blank dialog box which appears until the action is finished. 

Any ideas how to stop this white dialog box happening?

Thanks, 

Laura