Windows 10: How do you make the black borders with freeform snipping tool become transparent?

This is how it looks now -the snips are transparent here, but when posting them other place, like discord, they have black areas to put the snip in a black rectangle/they used to be ok, but they now have this black rectangle. is there any way for it to dissapear without having to edit them afterwards?

:)

 

Snipping tool freeform snip, background color when pasting

Ok, I'll try my best to explain this. I use the snipping tool almost daily for posting HW (I'm a teacher). Generally it is snipping from a pdf file (regular white pages) to my OneNote notebook. My issue now is with the freeform snip. Sometimes I needed
to use the freeform snip because of some diagrams on the pdf file that I needed to avoid so I have to snip around them. Before, when I used the freeform snip to copy a part of the page (remember, it's a white page) and then paste it on OneNote, the background
of the snip was white so it looked like a clean snip using the rectangular tool because the paste is always a rectangle anyways. Now (I guess there was an update or something) the background of the snip when I paste it is black. So I have this pasted rectangle
with the irregular cutout of the white page over a black background and it looks messy. Is there a way to change the background of the pasted snip from black to white? I hope this makes sense. Thanks.

 

Snipping tool freeform snip, background color when pasting

Wow! Thanks for your quick reply. Unfortunately this method didn't work. The high contrast setting is off. And the other suggestion doesn't seem to affect the snipping tool. Attached are two pictures of my situation. Both are of the same freeform snip.
The first one with the white background was done sometime in March, the other one with the black background snipped today. So if there's a way to change that background from black to white as a default setting, that would be great. Again, thanks for your
help.

 

Snip & Sketch with transparent borders?

Hi, I'm loving the new snip & sketch app that's replacing the snipping tool, but I have an issue with the free form selection. Whenever I select something, It places white borders around the image instead of leaving the "empty" areas clear. Is there a
way to fix this? I've searched through the settings and forums with no luck