Dear Gianpaolo,
1. change the size :
- change size of logo use photoshop
- go to Template Manager >> Theme tab >> Override logo image : select logo your
2. you want put top banner next to logo?
- please go to your_site\templates\sj_plus\layouts\main-left-right.xml and find:
<positions>
<position class="span4" data-tablet="span4" type="feature">@logo</position>
<position class="span3" data-tablet="span4" data-mobile="span4" style="none" type="modules">social</position>
<position class="span3" data-tablet="hidden" data-mobile="hidden" style="none" type="modules">search</position>
<position class="span2" data-tablet="span4" data-mobile="hidden" style="none" type="modules">contact</position>
</positions>
=>
<positions>
<position class="span4" data-tablet="span4" type="feature">@logo</position>
<position class="span8" data-tablet="span8" data-mobile="span8" style="none" type="modules">social</position>
</positions>
- then create a module(type customer html) >> insert your banner in this module >> chose position : social
Thanks!