nanoDLP

Hi, finally got my RP3 working via wifi using nanodlp. i am using a 2560 x 1440 lcd and manage to get that to work through the rp3 as well.

now i would like to know how to fix the projector calibration. the image does not sit in the middle of the lcd, instead it sits to the left.
i would like to upload a pic so you can see, but have no clue how to.