How do I add a button on the profile's portrait?

[Thadeusz Lay]

Next to the "online" and "follow"-button, I want to add another button (it's position should be on e.g. the bottom left of the portrait picture).

How would I do this with a plugin? What hooks do I need?

[pichalite]

@Thadeusz-Lay don't think there are hooks to do that. You can accomplish it by adding some js and css in ACP -> Appearance -> Custom HTML & CSS.

Here is an example. You will need to add code to handle what needs to happen on clicking the button.

Custom Header:

<script type="text/javascript">
$(document).ready(function() {
    $(window).on('action:ajaxify.end', function(ev, data) {
        $('[component="account/cover"] .avatar-wrapper').append('<button class="btn-new"><i class="fa fa-plus"></i></button>');
    });
});
</script>

Custom CSS:

.avatar-wrapper .btn-new {
    height: 2em;
    width: 2em;
    line-height: 2em;
    border-radius: 50%;
    border: none;
    background: #F44336;
    color: #fff;
    overflow: hidden;
    top: 93px;
    left: 4px;
   position: absolute; 
}