There has been quite a few people either ask about posting an image on these forums that the viewer can click on to see a larger version of that image.
This is quite useful to those who would like to comment on a photo. You often find too that a small version of a photo does not do that image any justice, so by being able to click on that smaller image and for it to open a larger one - everyone wins.
Below is how you do this from your Flickr account - if your images are on this site perhaps someone will post after me how to do that?
Step 1
Start a new thread in your selected forum subject.
Step 2
Open a new browser window and go to your Flickr photo
Step 3
make sure you're logged into your account and right click your image and pick "Medium 640"
Step 4
Right click the image and select "Copy image URL"
Step 5
Go back to the Forum Page and click on the "Insert Image" icon, and on the box that pops up, paste that image URL from step 4.
Step 6
Return to your Flickr tab/page and click on the "Large" link above your photo.
>>Repeat step 4 for that new larger image
Step 7
Back to your Forum page/tab and highlight All the previous link you made when you inserted the code for your photo
Step 8
Click on the "Insert Link" Icon and paste in the new image URL for the larger photo
Your image is now clickable.