trying to add pics

i'm trying to add pics to post/ threads and i can't figure it out . it says enter your url to add image , i believe the image would be my pics . i was able to add pics to album but not to my post / thread , as i'm new to this can anyone help me ? thanks

Read this in 2nd half:
start a thread, Post a Pic Post # 5687

upload a pic then click on the uploaded pics link
copy the url and paste it onto the icon that looks like a mountain