First - ensure that you are accessing the Sign & Edit mode.
Then - you may click and use this tool to redact information on a document.
• When you click the Redact button, you will have two options to choose from: Blackout or Whiteout.
• Once you select the style, you can click and drag over the section you wish to redact.
• Click on the gray X to remove the redaction.
Please keep in mind that any redaction will become temporarily invisible if you switch to the Fill Out Form mode.