Hello PAE
Sorry for the late reply, it was to nice a day for November not to go fishing.
I have since solved my problem in a round about way. My new header needed to be 940×198 pixels, the picture I was trying to use was 198×140 pixels, I did manage to resize (with the edit option from picture folder) the picture but always came out blurry.
I just looked for the exact size picture that I needed and it seemed to work out fine, for now. This might not always work of course.
I know how to write a little html code, in a beginner status. I would love to know how to change or alter the code to include all images, to show readable. My site https://rangefinder-golf.org I am now using the twenty one theme
Thanks