Each area (document, images, library, versions, branches) keeps its own cap and now also draws from one total per file open, 6 GiB (2 GiB on 32-bit targets), so a file can no longer make the app unpack about 10 GB. Read in that order, the document and the images up to their own cap fit, so a file whose images pass 4 GiB (#1313) keeps as many as before; images left out by the total stay in the file like those past the image cap. What passes the total is skipped (the document refused) with a note.