Is the top of the window position preserved?
I read somewhere, that if you’ve got large enough windows you should be aware that it is the top of the window position they aim to keep both when switching modes and when linking tabs together.
This kind of make sense as the program knows which line is the topmost which is displayed in the editor, and can correlate that to whatever html element is produced by that line.
This is a lot harder if you aim to preserve the position on something in the middle of the screen. Especially when you think about images being showed or not, different font sizes, and whatnot might change going from source mode to either of the other modes.