Read this:
@CHAR spot S X Y
S = size of the CHAR (default size is 1.280)
Example =
@CHAR spot 0.900 50 90
So if you have this, and you want their size to remain the same, you would NOT change 0.900 since that is their height.
If you want them to walk across in a straight line, you would NOT change 90 which is the “floor level” they are on. For example, if you wanted a character to walk from the top of the screen to the bottom of the screen, then this number would be changed.
For making them walk in a straight line at the same height, only the number 50 in this example (the X- axis, left to right, which way they are walking) would be changed. You can see what number you should put for the middle digit by testing out your spots on the web previewer or mobile.
Think of it like a grid. The y-axis goes up and down (negative numbers below, zero in the middle, and positive numbers up) as well as the x-axis that goes from left to right (negative numbers on the left side and positive numbers on the right side.)