when I create a pdf sometimes i need to give to the pdf file a different name from the original indd, but if i save the indd file after that it keeps the new name in memory and save with that name evry new pdf.
File: xxx.indd > yyy.pdf then all the other pdf will have "yyy" name even if the idd files name is xxx. There's a way to restor it? Thank's a lot
Try exporting to .idml and resaving that with the old name (in other words, overwrite the version of the file that has the new PDF name saved in it). The thread Salah linked is pretty old and talks about .inx, but I think .idml will do the same in newer versions.
Once youve gotten the default name back, make a habit of saaving before you export and close without saving after.