Sometimes need to make new item with most fields similar to one that exist or compare few of them.
Option to open them in separate windows will be helpful for that situations.
In such a case, you might also make it easier for you, if you “Clone” that similar item:
In the desktop app, go to that item → Right-click on it → Choose “Clone” → the cloned item is viewable or rather editable on the right – give it a new name etc. and click “Save” if you’re done
But clone option is not present on items from corporation.
Only in my private items i have that posibility
You could use the browser extension, which allows you to create multiple “pop-out” windows that you can place side-by-side.