You can simply press the
button and enter/paste the images URL in there. It's used when you uploaded images to hosts like imgur.com and so on.
You can also go to the advanced mode and use the attachments. Just press
and upload the file from your computer. You can put them into the text by using the
next to the
and either select single files or put them all into the text.
You will always see something like
HTML Code:
[IMG]http://www.3gapps.de/appicon/343297938.png[/IMG]
HTML Code:
[ATTACH]4574[/ATTACH]
I don't think that there is any way you can see the image in the text without using the "Preview Post" button