Window is centred due to WDP_CENTER in the window desc. Having multiple centred windows hasn't mattered in the past because they've been different sizes or different designs.

Could make them "unique" ? i.e. only open one storybook at a time? Would that be desirable? Otherwise will require some loops to check open (storybook) windows for centred positioning.

Honestly, I think the issue is that it opens in the center.

If this happens for popups, of all various of types, I totally get that. Those windows also have a very distinct background (either red or blue-ish), you notice them, they are often relative small, they require your attention / interaction .. opening those in the center: sure.

But this window has none of that. So I am not really sure why it would want to open centered, and not be like any other window? Mainly as it is, as far as I can tell, the only window to behave like this (that isn't a popup).

It's a storybook, so it opens centred - mostly as part of a "Welcome to this game type" message from a GS. Makes perfect sense that it would be centred, IMO (though perhaps the GS could centre it itself? Can GSes do that?)

Or maybe we can only make it centered if the GS opens it, and otherwise make it act like a normal window?

Is there any script where is any sense to open more than one window? I don't know but so far, I haven't seen a single one. Everywhere, the content of these windows is identical, regardless of whether the A, B company window or the global window is opened. I don't even know if it is possible to put variable data in this window. Maybe this function to open multiple windows is unnecessary at all? The only use I can see of being able to this is to be able to open several pages of that window on the screen to take a screenshot, but... that is a weak argument I think. :)