From Mod Wiki
integer index -- Index of the line to set the size of. float width -- New width of the line. float height -- New height of the line.
- This is only valid within the OnUpdateCrosshairInfo function, if called outside of this, the game will crash.
- This applies to both bar and image mode, but not text mode. Set the line mode using chSetLineType.
Sets the width and height of the specified crosshair info line.