There is so much about forward- and inverse search in the net - first it worked with the configurations I found online. But now it does not even work with the build in Viewer after deleting the ini to go back to the standard option.
My setup: Windows 10, TexStudio, Build in Viewer , Sumtra PDF. Under Commands, External PDF Viewer I put: "C:/Program Files (x86)/SumatraPDF/SumatraPDF.exe" -reuse-instance -inverse-search "\"C:\texstudio/texstudio.exe\" \"%%f\" -line %%l" -forward-search "?c:am.tex" @ "?am.pdf"
It sill jumps to random places - with both viewers. What option do I need?
(I also fixed my name of a .tex file that included in _ to -. No change to the better.)