Many thanks for your replies. Both the front panel and diagram are huge with hundreds of elements in many tab controls some of which are hidden for developing purposes and not visible to the users. I have no scaling active on objects when windows resizes. At start up I read the monitor resolution and I calculate the optimal dimension of tabs, graphs, ... and I position all items of interest consequently (starting from 0,0): it works fine. The point is that I don't want to define the position of all other elements (a lot) that I use for control purposes and that are part of algorithms calculation and so on . The most frustrating part is the diagram with wires, structures, numeric (add, sub, ...), ... that each time move: if I can periodically get a block of elements that moved in one panel and reposition all together, this job is not so easy to perform in the diagram where the starting cleanliness and tidiness of wire connection is lost every time. In any case I made now a simple test just to try to understand and quantify a little bit, adding a numeric indicator connected to anything with a property node reporting it's position displayed on the screen: depending on the place where I put the indicator, each time I restart the software, I can see always the same position in some cases or I can see this numeric indicator "moving" with a difference each time of 5 pixels in horizontal (from left to right) and 1 pixel in vertical (from top to bottom) even if I put this element in a tab control which position is fixed at start up !
