There are two ways, two approaches, to insert photos in posts on WTW, and they produce different results/appearance:
- In the approach that Frank referred to you upload the photo directly from your computer to the post, using the "Attach Files" dialog at the bottom of the Full Editor:
A thumbnail image appears in the post, which the viewer needs to click on and then it opens up to full size.
- In the other approach you first need to upload the photo to somewhere on the Web -- here in a WTW Gallery or somewhere else, such as one of the photo-sharing sites (e.g., Photobucket, Smugmug, Snapfish, etc.). Then in the post you use the Image tool -- one of the icons in the tool bar above the text window -- with a link to wherever you uploaded your photo:
The full-size image appears in the post, no clicking required (though you can, and it opens the pic in a separate window).
Approach 1 is simpler, but with a couple of significant disadvantages: There's a tight limit on how many bytes of image you can upload per post (500 kB -- maybe only 2 or 3 good-size images per post, maybe only 1 if it's not compressed much) AND the viewer has to click on the thumbnail to see it at a usable size.
A lot of people (including me) use the simpler Approach 1 for posting a few pics to illustrate a camper modification or problem, but use the more-complicated Approach 2 for inserting photos in a trip report, because it creates a "nicer" presentation that doesn't require clicking on each pic.
I created an illustrated "How To" explanation for this -- mainly Approach 2 -- a while back, but when WTW updated their software it changed how links to a WTW Gallery image work, so my explanation needs to be updated. I'll do that soon.