I can’t see the “Change Avatar” menu link on my...

Your members should change profile avatars on the Gravatar.com. The “Change Avatar” menu link is hidden because BuddyPress system doesn’t allow to have square avatars and horizontal group thumbnails. It’s a limitation of Buddypress (one cropping shape) and it’s confirmed by BP developers.

Anyway if you really want to let your users to change their avatars on your website then there is a small trick.

First you should create all your groups, then open functions.php and replace:

define( 'BP_AVATAR_FULL_HEIGHT', 125 );

for:

define( 'BP_AVATAR_FULL_HEIGHT', 185 );

Now paste following code into the myStyle.css

#change-avatar-personal-li { display:block!important; }
.page-template-frontpage1-php a.group-box-image img, a.group-box-image img, .single-group-box-image-container img { height:125px!important; }