Thank you for your question.
Please do the following steps to help you change markups status:
1.Open the DWF/DWFx file in Autodesk Design Review.
2.Make sure the Markup Properties Palette is shown:Home tab->Workspace panel->Show/Hide Palettes->Check on Markup Properties checkbox.
3.Choose the markups which you hope to change status.
4.Navigate to the Markup Properties palette on the left side of Canvas.Click the Status drop-down button to change the Markups' status.
Please let me know if I can be of any further assistance.
Thank you for your feedback.
Current ADR cannot change the default color of markup status.
I have added a whishlist for your request to our defect database, and it will be considered for possible inclusion in future releases.
Your patience and support is appreciated.
I second the motion to add that to the wishlist. Our company has very specific colors to be used for checking off a comment.