Positioning pop-ups

From the current behaviour of (blocking) pop-ups I assume they are "centered" on the display. Is there a way to define their position?
1 answers

There is currently no way to position a modal pop-up from the Modeler.

It's centered because 'the center' is something that can be calculated consistently in every viewport. Fixed (or even non-center relative) positions will generally result in different positions on different screens.

Is there a specific use you have in mind for this?