I thought a tutorial for inserting pictures in a post might help those who like me, are visual.
Before we begin, a word of caution.... Never hot-link a picture which is not yours without permission unless it's a BIG company such as Vogue and for which the more you link, the more advertisement, the more sales. Netiquette wants you though to mention the source of the photo by adding a link to their site in your post. For smaller companies and cottage businesses, hot-linking can be a real problem so it's preferable not to hot-link directly from their site.
For many, this tutorial will sound very, very basic at times. But I thought the new members who are not at ease with forum posting may find the basic tips handy.
This image of meringue mice is from an old cooking blog I used to maintain when I was a SAHM. We will make believe this is your picture in your photo-host album.
My browser is in French, sorry... I'll try to transalte the best I can.
And I use Firefox but it works pretty much the same on other browers I suppose-hope.
1- Right clic on your picture. On the pop-up menu which appears under your mouse pointer, clic on "Copy Image Link" or may be "Copy Image URL" 
2- Now create your post on SG. Write your introduction. Place you mouse cursor where you want your image to appear in your post. Clic on the framed picture icon. 
3- You just created the brakets for your image. Now insert your mouse pointer where you see the red straight, vertical line, in between the brakets.
4-Right-clic and hit "paste" on the pop-up menu which will appear at the tip of your mouse pointer. Here's what it will look like. Notice you can't see the image yet. You only see its Internet address (I underlined it in red on the image below)
4-At this point, you can hit "Post" and your image will be in your post for everyone to see. But I tend to use the "preview" button because it's the only way I know to check if the image will really be for everyone
4- You'll see both the preview and the actual post which you can edit.
Using the preview feature allows me to edit typos or text or add emoticons.
There are other ways to do that, but IMHO this one is easy and straightforward.
Note that certain photo-hosts do not allow hot-linking. I use xs-to and I can hot-link. I don't know which ones don't allow that.
HTH,
