Export/convert tif to pdf

there are similar post but they are years old so i was hoping there was an update.
Is it yet possible to export to a pdf instead of a TIF? the flights are thousands of pictures and the TIF file is between 3-4 GB. i have yet to find an online converter that will take a file that size and my Bluebeam wont open it either.
Screenshot has too low resolution to be useful.

Hi Sean,
I am sorry but this feature is not available in Mapper. I suggest using a GIS software like QGIS or ArcGIS to convert the image to a PDF.