serval problems
1. The latest version does not import a PDF index.
2.the version of zotero 4,Plug-ins have been installed, but PDF cannot be imported
2.the version of zotero 4,Plug-ins have been installed, but PDF cannot be imported
2. Zotero 4 is no longer supported, sorry.
another problem is i imput paper through bib and then link pdf, but when i open the linked pdf it is opened in other app(such as xodo)
Zotero opens PDF with your system's default PDF viewer (it'd have done that in Zotero 4, too).