If you don’t like the idea of an angled online image like the one that is default in the Prosilver theme of phpBB3, you can move to an Online/Offline text tag instead.

1. Go to your ACP
2. Click on the Styles Tab
3. Under Style Components click Templates
4. Click edit next to Prosilver
5. In the dropdown, select viewtopic_body.html
6. If you already applied my Profiles Left Mod, find this code:

<dl class="postprofile<!-- IF postrow.S_ONLINE --> online<!-- ENDIF -->" id="profile{postrow.POST_ID}"></dl>

Change it to:

<dl class="postprofile" id="profile{postrow.POST_ID}"></dl>

This just removes the online class from the postprofile dl object, which is responsible for the angled online background image.

7. Find the following code:

<dt>
				<!-- IF postrow.POSTER_AVATAR -->
					<!-- IF postrow.U_POST_AUTHOR --><a href="{postrow.U_POST_AUTHOR}">{postrow.POSTER_AVATAR}</a><!-- ELSE -->{postrow.POSTER_AVATAR}<!-- ENDIF -->
				<!-- ENDIF -->
				<!-- IF not postrow.U_POST_AUTHOR --><strong>{postrow.POST_AUTHOR_FULL}</strong><!-- ELSE -->{postrow.POST_AUTHOR_FULL}<!-- ENDIF -->
			</dt>
 
			<!-- IF postrow.RANK_TITLE or postrow.RANK_IMG -->
<dd>{postrow.RANK_TITLE}<!-- IF postrow.RANK_TITLE and postrow.RANK_IMG --><!-- ENDIF -->{postrow.RANK_IMG}</dd>
 
<!-- ENDIF -->
<dd> </dd>

Change it to:

<dt>
				<!-- IF postrow.POSTER_AVATAR -->
					<!-- IF postrow.U_POST_AUTHOR --><a href="{postrow.U_POST_AUTHOR}">{postrow.POSTER_AVATAR}</a><!-- ELSE -->{postrow.POSTER_AVATAR}<!-- ENDIF -->
				<!-- ENDIF -->
				<!-- IF not postrow.U_POST_AUTHOR --><strong>{postrow.POST_AUTHOR_FULL}</strong><!-- ELSE -->{postrow.POST_AUTHOR_FULL}<!-- ENDIF -->
			</dt>
 
			<!-- IF postrow.S_ONLINE -->
<dd style="color: #00ff00">Online</dd>
 
<!-- ELSE -->
<dd style="color: #ff0000">Offline</dd>
 
<!-- ENDIF -->
 
			<!-- IF postrow.RANK_TITLE or postrow.RANK_IMG -->
<dd>{postrow.RANK_TITLE}<!-- IF postrow.RANK_TITLE and postrow.RANK_IMG --><!-- ENDIF -->{postrow.RANK_IMG}</dd>
 
<!-- ENDIF -->
<dd> </dd>

What this does is adds the following code above the Rank Title or Rank Image (or both) in the postprofile block.

<!-- IF postrow.S_ONLINE -->
<dd style="color: #00ff00">Online</dd>
 
<!-- ELSE -->
<dd style="color: #ff0000">Offline</dd>
 
<!-- ENDIF -->

You can move that chunk around and put it below the Rank Title/Image or elsewhere. Let me know if you need more help.