McGarrett,
If you have the photo on your computer screen Look for a accessory (windows) called Snip and Sketch.
Use Snip and Sketch to take a new image of your picture, save that new version and use that to post to Fordbarn.
In my experience that is always small enough to post here on the barn.
You can also use it to zoom into just a pert of an image (crop) and add arrows and text to help explain what you are trying to show.
I made a video once about posting images on here, but it is a bit out of date now. I did illustrate the snip and sketch app though.
I found the video:
https://youtu.be/dv-CO6QWCFg
I just watched it through and it is actually still pretty relevant after all.
Mart.