I can repro but not exactly sure what the problem is. If I let go of the mouse but still hold down Alt, I can sample a color from the other document. (If that was the intent.)
thanks, yes that's the intent - thanks, happy you can also see this issue
I have a dual monitor setup, so let's say on Monitor 1, I have a photo (displayed on a webpage in Firefox, for example). On monitor 2, is my Photoshop document, which is zoomed in close enough so the horizontal/vertical scrollbars are showing.
So in Photoshop, if I want to sample a color from the photo on Monitor 1, I have to hold down ALT, hold down the left button, then drag the cursor over to monitor 1 where the photo is, to sample a color. This is when the document on Monitor 2 (In Photoshop) scrolls way off-screen. The reason this is a problem is because I am doing this several times per minute, and am constantly having to scroll the document back into view on Monitor 2.
I'm happy you reproduced this - is it a bug or something? Why should the document scroll off screen like that when sampling a color from a different document/photograph?
This isn't a bug; it's by design. Because you're actively sampling a color, Photoshop is assuming you want to sample a color from the active document, so it moves the document to accommodate.
You would just let go of the mouse but still hold down Alt to sample from another source.
ok, I understand now - makes sense. Thanks for the answer, I should have had that one figured out already