This is a short description about how to put images within posts:

Click on the clip image (1)





A new window opens, then click on (2) and select the image/video that you want to upload from your harddisk.
You have 3 rows for image upload that you can fill.

Once we have the images selected click on Upload button (3)






After some upload time this will be the result. (4)






We can go to the previous window and click again on the clip (5). It will show attached images that we can put on the post clicking on them (6).
It will put [ATTACH]XX[/ATTACH], that will be our image in the post. (Try Preview Post button).