Let me try...

At the bottom of a post at the far right is "thanks"...to the left of it is Q-reply....this is quick reply.

Further next to the left is Quote, which brings up a quote with tags of the post you are quoting.

The Reply box (no quote feature) is not in a post. It is down to the left of the page where the post appears. It is blue in the default blue skin.

We have different skins here. The blue one is the default skin and has a pencil icon to the far right of the end of the post. Click on this and the quick reply box changes from beige to active and then you can type in it.

To view the different skins, go to the main index page. Scroll down all the way to the bottom, and at the far left is a little narrow horizontal box with a down arrow. Click the arrow and
it will bring up types of viewing changes you can make. I use Spring, for example. It is the easiest on my eyes.