Print is central in slicer but not on print bed. How to fix?
I am printing a large PLA sheet that takes up the width of my 2T XL printer. In Slicer, the print appears perfectly central. I went to check the printer after the print was well underway and noticed that the print is not central on the bed. It is shifted to the left slightly. The effect of this was to cause a collision between nozzle and print which then lifted the print.
The only unusual thing is that I just changed from satin sheet to powder coated textured sheet but I don't think that would affect the size or placement. I also do not recall where I would tell the XL what sort of sheet is mounted.
How can I do to make the print sit centrally on the bed? 
Meanwhile I will manually offset the model in Slicer.
RE: Print is central in slicer but not on print bed. How to fix?
SOLVED. Alas, using a bright torch, I see that the print sheet was not perfectly registered against the pins at the back of the print bed. Silly me.
