Hey guys, thank you for all these details.
Indeed, I need to plot multiple stuffs in my graph, such as vector, angles, line-points-text. Because of that, it is a bit tricky to reverse the y-coordinate by hand on every object. It is especially true for vector as I'd rather to use them without splitting x-y values.
My code, for the moment looks like:
Show[ListLinePlot[{{{posLEwithFKF[[1]],
posLEwithFKF[[2]]}, {posMEwithFKF[[1]],
posMEwithFKF[[2]]}}, { {posPLCwithFKF[[1]],
posPLCwithFKF[[2]]}, {posPMCwithFKF[[1]],
posPMCwithFKF[[2]]}}, {{posMTEAwithFKF[[1]],
posMTEAwithFKF[[2]]}}},
PlotRange -> {{Min[posLEwithFKF[[1]], posMEwithFKF[[1]]] - 20,
Max[posLEwithFKF[[1]], posMEwithFKF[[1]]] +
20}, {Max[posPMCwithFKF[[2]], posPLCwithFKF[[2]],
posLEwithFKF[[2]]] + 20,
Min[posPMCwithFKF[[2]], posPLCwithFKF[[2]], posLEwithFKF[[2]]] -
20}},
Frame -> {{True, False}, {True, False}},
FrameLabel -> {"X\!\(\*SubscriptBox[\(\\\ \), \(FKF\)]\)",
"Y\!\(\*SubscriptBox[\(\\\ \), \(FKF\)]\)"}, Mesh -> Full,
MeshStyle -> Directive[PointSize[Large], Red]],
Graphics[
Text["LE", {posLEwithFKF[[1]], posLEwithFKF[[2]]}, {-1.5, -1}]],
Graphics[Text[
"MTEA", {posMTEAwithFKF[[1]], posMTEAwithFKF[[2]]}, {-1.5, -1}]],
Graphics[Text[
"ME", {posMEwithFKF[[1]], posMEwithFKF[[2]]}, {-1, -1}]],
Graphics[
Text["Proj C.P PLC", {posPLCwithFKF[[1]],
posPLCwithFKF[[2]]}, {-1, -1}]],
Graphics[Text[
"Proj C.P PMC", {posPMCwithFKF[[1]],
posPMCwithFKF[[2]]}, {-1, -1}]],
Graphics[
Arrow[{{posMTEAwithFKF[[1]],
posMTEAwithFKF[[2]]}, {posMTEAwithFKF[[1]],
posMTEAwithFKF[[2]]} + vectorTEAforAlphapost/4}]],
Graphics[Arrow[{{posMTEAwithFKF[[1]],
posMTEAwithFKF[[2]]}, {posMTEAwithFKF[[1]],
posMTEAwithFKF[[2]]} + vectorPLCtoPMCinFKFinXY/2}]],
Graphics[Text[Style["Alpha post", Green],
{posMTEAwithFKF[[1]] + vectorPLCtoPMCinFKFinXY[[1]]/4 ,
posMTEAwithFKF[[2]] + vectorTEAforAlphapost[[2]]/8}
]]]
And I want to reverse only the Y-axis with a simple command if possible. But if I have to do it for every object, I'd better to let it like this and put a comment how to read the graph!