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[BetterRed]

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@Audra - maybe this will help ==>> How to Move a Lost, Off-Screen Window Back to Your Desktop

BR

[HarryT]

Originally Posted by kovidgoyal

That just means it is opening on a third monitor, presumably, one that was connected at some time in the past.

Agreed, but if he deletes the settings, shouldn't the default opening position then be on the primary monitor?

[theducks]

Your phantom 3rd Monitor could just be a Different 2nd Monitor. Windows remembers the Device (id)

2 of my monitors really belong to Other systems. When I switch them over to this system, Windows (10) recognizes where they WERE placed (XP always forgot it was to the LEFT or Above)

[kovidgoyal]

Originally Posted by HarryT

Agreed, but if he deletes the settings, shouldn't the default opening position then be on the primary monitor?

See post #13

[HarryT]

I don't know if it's different in Qt, but in the multi-monitor setups I'm familiar with (Windows), the primary monitor is always the one with the original of the coordinate system at its upper left corner, so opening a window at coordinates (100, 100) (to pick a random example) should always result in it being visible.

[Audra]

Then it had added a third monitor by itself, because I have only ever had two monitors. And I think it thinks I have 4 monitors, because of the number of times I have to hit the arrow key along with the windows and shift keys.

[Audra]

My posts are disappearing from this screen. So are other replies that I have read.
I have never had more than two monitors attached to this computer.

Also, the post from HarryT has disappeared.
"I don't know if it's different in Qt, but in the multi-monitor setups I'm familiar with (Windows), the primary monitor is always the one with the original of the coordinate system at its upper left corner, so opening a window at coordinates (100, 100) (to pick a random example) should always result in it being visible. "

I don't know what Qt is but I have windows. How do I set the window being opened at coordinates that always make it visible?

[Audra]

Now posts have reappeared. This is very strange.

[HarryT]

Originally Posted by Audra

I don't know what Qt is but I have windows. How do I set the window being opened at coordinates that always make it visible?

Qt is the device-independent graphical "framework" that Calibre uses to draw things.

[theducks]

Originally Posted by Audra

<snip>

I don't know what Qt is but I have windows. How do I set the window being opened at coordinates that always make it visible?

When you exit Calibre NORMALLY (ctrl-Q, AKA Quit), rather than Killing,crashing or just shutting down the computer with programs open.
Calibre saves the last location of many screens (OK/Cancel types tend to just show on the Main monitor).

Failure to save (and have it stick), may indicate something is getting the way or fighting it. A sync program that keeps putting back the 'old' version. A/V or bad User permissions, blocking changes to the configuration folder.
Hints on where to explore, may be indicated by what OTHER PROGRAMS happen to also misbehave

Temporaily have Windows (Display settings) use the other monitor as Main (and the old main, 'extend the desktop". You may need to drag the positions around: 2:1 instead of 1:2 )

[Audra]

Originally Posted by theducks

1 is typically the Main (with start menu)

by rearrange,

was: 1 below, 2 above
now: 1 on Left, 2 right

was: 1 landscape, 2 portrait
now: both landscape

or you change a monitor size or resolution

I am sorry, but I do not understand this at all. But I appreciate your attempt to educate me.

[Audra]

Originally Posted by kovidgoyal

How are you launching the viewer? From within calibre or as a standalone application? Presumably Qt thinks your second monitor is the main one, which is why the window shows up on that by default. I dont have any experience with multi-monitor setups so I dont know how to go about convincing it to use a different monitor as the main one.

It is not doing that. If it did that would be fine. The window does not show up on the second monitor or the first monitor either. It seems to be using a nonexistent monitor to show the window.

[Audra]

Originally Posted by BetterRed

↑ ↑ ↑ ↑

@Audra - maybe this will help ==>> How to Move a Lost, Off-Screen Window Back to Your Desktop

BR

I appreciate the thought. Clicking on cascade windows, however, causes the windows that are open on the first monitor to display on the first monitor. The second monitor shows the cascade of windows open on the second monitor. Presumably, it causes all open windows on the missing monitor to cascade on the missing monitor and I cannot see them.

[Audra]

You say see post 13

Originally Posted by kovidgoyal

How are you launching the viewer? From within calibre or as a standalone application? Presumably Qt thinks your second monitor is the main one, which is why the window shows up on that by default. I dont have any experience with multi-monitor setups so I dont know how to go about convincing it to use a different monitor as the main one.

But the window does not show up on any monitor. It does not show up on the second monitor by default. I would no have a problem if it did that.

[Audra]

Originally Posted by theducks

Your phantom 3rd Monitor could just be a Different 2nd Monitor. Windows remembers the Device (id)

2 of my monitors really belong to Other systems. When I switch them over to this system, Windows (10) recognizes where they WERE placed (XP always forgot it was to the LEFT or Above)

Thank you for your attempt to help, but I do not understand anything you said. As far as I know, I have not operated any other systems. No changes of any kind were made on my computer. Just the change happened in Calibre. And not in any other programs.