OK...now you test and try ..
nb: if you are posting a picture that is quite big, the option of copying and pasting the IMG code would be best.
Keep in mind that some members still use dial up and big images slow down the uploading of the pages.
Also, if you have posted a picture using the second option (with the image URL) you can resize it like this:
[img width=800]URL[ /img]
or even
[img width=400]URL[ /img]