Thanks for the bug report, Joe, and sorry for the delay in reply.

If the image windows really are opening completely off screen (as opposed to not opening at all), then you can usually work around the issue on a Windows system by pressing Alt+Space, then M, then the left arrow key, then moving your mouse around. The window should snap to your mouse in that case, and you can then relocate it by moving the mouse cursor then clicking.

So, if I understand correctly, you _had_ your dual monitors set up to extend your desktop, and then when you disabled one of the monitors, some images open off screen?

But the window placement logic in ImageJ1 and Bio-Formats is quite scattered, so it would be very helpful to have some additional information:

* What is the resolution of your desktop?
* What is the resolution of the problematic TIFF & ND2 files?
* If you convert problematic TIFF to JPEG, does the problem happen when you open that JPEG?
* Are you able to reproduce this issue on any system besides your own?
* Does the problem ever happen if you have your dual monitors enabled?
* Does the problem _only_ happen with the File>Import>Bio-Formats command? (Not File>Open)

Our goal here is to reliably reproduce the issue on one of your systems here, so that we can develop a fix for the issue. So any additional information you could provide along the above lines would be very helpful.

From Joe via email:

> * What is the resolution of your desktop?
>
> 1366 x 768
>
> * What is the resolution of the problematic TIFF & ND2 files?
>
> 512x512
>
> * If you convert problematic TIFF to JPEG, does the problem happen
> when you open that JPEG?
>
> Yes and no. I've got a script that converts the tiffs to pngs. The
> pngs always open on my screen. The tiffs always above my screen (where
> the 2nd monitor would show).
>
> * Are you able to reproduce this issue on any system besides your own?
>
> Haven't tried.
>
> * Does the problem ever happen if you have your dual monitors enabled?
>
> The problem would and does happen, only that when I have both monitors
> so I can easily see the image in the upper screen and manipulate it
> accordingly.
>
> * Does the problem _only_ happen with the File>Import>Bio-Formats
> command? (Not File>Open)
>
> I am unsure. I can't open these tiffs without going through
> Bio-formats. 
> 
> If I had to guess, I would state that imageJ detected my dual monitor
> settings once and now assumes that those settings are always on.
>
> I'll try your current work around. This only affects me when I'm at
> home (on a single monitor) as at work I have my dual monitor present.
>
> I'm on UW-Madison campus, if you want to check out my ImageJ. 

Thanks for the feedback. I'll take a stab at reproducing this on my system later this week, and follow up with any additional questions. Since you are local, if all else fails, I could come over physically to diagnose further. Will keep you posted.

From Joe via email:
> I've figured something out that may or amy not be of interest. If you
> do your suggested trick, nothing - off screen. But if you click
> maximize, it comes back to the screen and all subsequent images are
> back on screeen now. Joe 

I looked into the code a bit, and I am guessing the problematic section is this:

https://github.com/imagej/ImageJA/blob/v1.49d/src/main/java/ij/gui/ImageWindow.java#L151-L158

I.e.: the last location is saved in the ImageJ preferences. This suggests that perhaps the problem will go away if you call Edit > Options > Reset to clear your preferences.

Care to give it a try?