Q: Have written a report which contains 3 photos.  How do I reduce the file to email

Try control - click Compress.

Little more explanation.

Try control - click Compress.

That's a right click if your using a two button mouse.  Then ease down to the compress option and click.

I don't think the built in file compression will result in photos compressing much.  This is a generalized file compression.  You need to use photo compression app.

1) You get a dropbox.com or box.com account.

Upload the photos to there and then pass along the links in your email.

2) While I haven't got it to work, the latest version of Thunderbird offers to automate the process by uploading large attachments to box.com and substitute links in the email.

3) I find doing file compression easier in ios.  I use  dukto  ( or airdrop ) to transfer photos to my iPhone 4 7.1.2.   I then email the photos back to myself.  ios automatically offers to compress.  for more control over compressing, I use photo compress app.

When you send an email with large attachments—you have drop down menu to choose file size:

Yeah; everybody tries this.   Most mail servers are configured to prevent this from working, as it's a trivial way to obliterate whoever you're emailing these messages to.  To fill up the server.   It's what's called a denial of service attack.   You're filling up the storage on the mail server, and the folks managing the server don't want that to happen (easily).

This means either sending smaller photos — smaller size, lower resolution, etc — or changing approaches and using iCloud and its Mail Drop feature (even Mail Drop has limits), or use Dropbox or some other hosting service and put the photos there, or use a photo gallery service, or send the larger photos one at a time.

It's best to put what you want to compress into a folder.  Pick a file or folder.  Right click on file or folder [ hold down control key the click with mouse if you have a one button mouse. ]  You will see this.  Then you click on compress.

after clicking on compress, you will see a file "Yard plants & House.zip"