In part two of this blog, Paul Myers hands out new search tips as well as advice on backing up what you’ve found: 1. Searching for photo comments and ‘likes’ Using Facebook Graph searches, people can see a list of the publicly viewable photos you have clicked ‘like’ on and read the comments you’ve posted. Once again, this involves looking up a user ID and pasting it into a web address. Let's use Mark Zuckerberg's again. You will remember that his Facebook ID is the number 4. So a Graph search address to find the photos he likes would be: https://www.facebook.com/search/4/photos-liked A Graph search address to find the photos he has commented on (pictured above) would be: https://www.facebook.com/search/4/photos-commented You can also do a Graph search to find the photos he has been tagged in: https://www.facebook.com/search/4/photos-tagged 2. Photos can be traced back to Facebook accounts The images on web pages have their own file names. Some might be named after the subject (eg. centralpark.gif). Some might have been automatically named by the camera that took the photo (eg. dsc_1234.jpg). Others will have been named by a website's database. You can see an image's name by simply right-clicking on it and saving it on to your computer.

If you upload an image to Facebook or Instagram its name will be changed to something really long and complicated - usually consisting of three bunches of numbers separated by underscores and finishing with ‘n.jpg’. So if you ever see an image named like that it's probably spent some of its life on Facebook. The second bunch of numbers in this file name relate to the Facebook account the image was uploaded to. The photo above belongs to the photographic artist Marc Blackie. If you copy and paste the second bunch of numbers into a Facebook.com web address you'll find the image in Marc's Facebook photo album: http://www.facebook.com/10152728722695485 Of course that's no guarantee of the subject or ownership of any photo, but this technique can provide useful clues in an investigation. 3. You can search the internet by profile picture People often use the same profile pictures on various websites and social networks, so it can be handy to see where else they pop up. You can do this by uploading saved pictures to services like TinEye and Google Images (click on the little camera icon in the search box). If you are using Chrome you simply have to right-click on the photo and choose ‘search Google for this image’. Google will then show you addresses of other pages where your chosen image appears eg. Twitter accounts, blogs and personal websites. 4. You can tell Google Images to only look on Facebook You can restrict a Google Image search to Facebook pages by adding “site:facebook.com” to the search box. This also works with Google's reverse image search feature. 5. You can give yourself extra search powers If you are prepared to do a little bit of research and some cutting and pasting you can make your searches more powerful and accurate. Facebook introduced its new search back in December 2014, but it has many problems, not least its inability to specify search subjects. You can search for mutual friends of Dave Jones and John Smith but you can't specify which Dave Jones or John Smith you are interested in. The previous Facebook Graph search allows you to specify people and pages in your search, with a lot more besides. And you can still use it. Find out how by visiting this guide and checking out these graph.tips.

6. There are many ways to research topics in Facebook The Facebook search box You can use the search box but it tends to give you stuff your friends posted, so may not be much use for journalists. If you are looking for a page rather than a person, you need to specify this in your search. For example, a simple search for "Steve McQueen" will find you pages about the 1960s US icon rather than the British director of 12 Years a Slave. Instead, search specifically for the phrase: pages named “Steve McQueen”. The results are radically better and include the British director as well as the US actor.