Hi Eric, from Mac Help: 'Zip':
Compress a file or folder: Control-click it or tap it using two fingers, then choose Compress from the shortcut menu.

If you compress a single item, the compressed file has the name of the original item with the .zip extension.
If you compress multiple items at once, the compressed file is called Archive.zip.
Uncompress (expand) an item: Double-click the .zip file.
You might perhaps also want to make a disc Image (.dmg) using Disc Utility: File > New Image > Image from Folder.
Don't forget Airdrop on more recent Macs when the two devices are close to each other, nor the new Mail Drop when you need to send very large attachments. Details can be found in Mac Help if you search for Zip and then explore.
Depending on the contents of the file you want to zip, compression may not be able to make it much smaller. I won't bore you with details of alternatives you may not need but if it's still too large, post back.
Hmm, compressing them to a Zip file is certainly quick but it doesn't seem to give'em much of a squeeze, e.g. 36.9 is compressed to 36.3. I can't be bothered with Dropbox, mainly because I've not yet worked out how to use it. It is still too large Mick: 191MB
Thank you,Trevor, it worked. How can I thank those philanthropists ? Or will I be getting loads of emails from young ladies who've discovered how attractive I am?
I would have suggested a service like the one Trevor mentioned - there are several. (Were you trying to compress photographs in jpeg format? If so, that's why - it's already a compressed format)
Aha, not exactly Mick, I've scanned pages of an illustrated children's book in French, imported them into Affinity Designer, deleted the existing text and inserted my own in both languages, and exported them to PDF. The total size is about 191 MB. It took about two hours to send them but it was very simple.
Eric Jervis 