How to get the coordinates inside the canvas independent from World coordinates

so to give you an overview about what i'm doing, i'm making an Options menu, that contains a Controls menu, in which the player can move around the buttons and place them in a layout that suits him best. Well most of the background coding is done, the only problem i'm facing now is positions. I'm storing the position of the buttons in the Control options menu, then assigning them to the buttons in the canvas menu inside the game, but the position aren't the same (well they shouldn't since i know i did it wrong), because i'm taking the position to wordspace, not to canvas, so i want to store the position inside the canvas and then assign it to the buttons ingame, note that both options menu and in game has a canvas with the same size, but not the same position that's why the problem is appearing so i either have to change the position of the canvas to be the same in both scenes, or get the position inside the canvas instead of worldspace, i choose the second option, hopefully there is a way to do it. Thank you for taking the time to read this, looking forward for your answer