Thanks Andrew for 'highlighting' this feature on the website blog - http://www.qcad.org/en/
I must admit I didn`t actually think about using this feature (as you say on the blog "it might not get your attention right away").
But having now looked at this properly, I can now see how useful this feature is. Especially for me if I need to print/laser cut something to a specific material and I only have for example A4 sizes of that material - it certainly 'speeds' up the re-aligning/positioning process!
I have now used this feature already on a little job where I had to use 2 sheets of only A4 size material, this method is so simple to use and quick to 'drag' and reposition stuff.