How to leave the Destination URL cell empty ?

Do you mean the link option when you insert media? If so, just choose “None” for the link option from the drop-down menu during insert.

Thanks James
I meant this one https://www.IreneEng.com/wp-content/uploads/2014/12/url-add.png

I couldn’t remember where did I insert this – I wish it to be blank by default.
Thanks
Happy holidays

(P.S. I checked “Notify me of follow-up posts via email” but was never notified.)
Irene