View and Edit Raw Request before sending

New to APIs/Postman
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Thanks Danny,

I’ve tried this and the seems to be working for my basic ping test yet it still doesn’t show the inserted headers in a Raw request or the Code view, even after running it. Nor are the headers shown in the Temporary Headers tab.
This is what I added. First to the Collection then moved to request itself.

pm.request.headers.add({key: 'Authorization', value: 'SWSS xxxxxxxxxxxxxxxx' }) 
pm.request.headers.remove('Postman-Token')
pm.request.headers.remove('Cache-Control')

I noticed that it didn’t show the Postman-Token or Cache-Control headers as removed. I’ll check if they are with Wireshark later though wish this wasn’t necessary.