You’ve designed a complex die-cut tray. Now you need to array it across a B1 sheet (700mm x 1000mm). Manually copying and pasting risks overlaps and ignores grain direction.
To get better , you must stop watching and start doing real-world constraints. artioscad tutorial better
Folding your design in 3D allows you to see if panels overlap or if a tuck-top is too tight. You’ve designed a complex die-cut tray