Auto saving tags

Hello, even though 'Tools -> Options -> Tags -> Save tags when using arrow keys' is turned off, I am still finding tags being written to disc when a tag field loses focus. I would like to be able to prepare all the tags for a group of files first, then write them to disc in one operation. Is this possible?

Instead of entering data in the file list, select the files and enter the data in the tag panel, then press Ctrl-S to save.
It will not really work for data that is individual to single files, though.

I understand, many thanks