Multiple file names in a kind of box

Hello friends.
Can someone help me or tell me if it is possible to save multiple file names in a kind of box?
I'll explain myself better: In practice, I would like to have the option in the dialog box where you can type in the file name, a selection box where I already have several predefined names. Eg: project, inventory, calculations, report, etc. that would be very helpful because I have to save most PDFs with the same names over and over again. Thanks for your help.