Thank you for your attention,

Friends, I have been looking at how futures operate; the truth is I haven't understood it well. I would appreciate it if you could clarify it for me to see if I can understand:

1: The Margin: Is it what they risk in the operation?

2: Is the profit the PNL or the ROI?

3: Is it leveraged x14?

4: If in those images the liquidation price is reached, how much would I lose, just the Margin or more?

Postscript: The image is a screenshot from another post, as I won't take risks until I know.

Blessings, and thank you for responding; it is valuable to me!