Okay, I downloaded the zip file. I extracted it to the subdirectory Pascal, in my home directory. There are 70 small files there, including bgrabitmappack.lpk and lots of .pas and .inc files. It looks like I need to copy these files somewhere, perhaps into some subdirectory or subdirectories of /usr/lib/lazarus/ ?
Why didn't Gdebi automatically install BGRABitmap with Lazarus 1.2.0?
Where am I supposed to extract the BGRABitmap package to, so that it shows up in the package install list?
Why doesn't the tutorial page mention these details?
TIA