preview
When I am working with 10 – 15 open windows in Preview I often accounter the problem that I can't open a new PDF-window. Instead I need to open it in iBooks to make it work. I have no other PDF viewers installed.
Has anyone else had this problem and does any one know what I can do about it?
So Preview does not have this feature, but more on that in a moment.
I would strongly recommend you take a look at f.lux.
f.lux makes your computer screen look like the room you're in, all the time. When the sun sets, it makes your computer look like your indoor lights. In the morning, it makes things look like sunlight again.
f.lux will adjust (you can modify the strength) the colour of the whole screen to make it easier on your eyes. You can set it to be on all the time, or automatically come on at night time. People love it.
Adobe Reader for Mac does support this. Once you install the 400MB app, you can change the background colour in Preferences (⌘ cmd + ,) > * Accessibility** . Check Replace Document Colours, and set the right colours you want.
You can use the mastodont Adobe Reader.
In fact, this app from Adobe, formerly named Acrobat, was the app provided in Macs, before Preview existed.
Best Answer
Preview has 2 settings for opening files.
One is Open all files in same window
the Second one is Open all files in separate window.
The open all files in one window side bar will show all files, and will add a new open file toit.
But, check your settings for Sort by in the side bar, pending those setting the new file might not open at the bottom of the list, so with 15 files open you might miss it.