Nadir, OK terminology is going to cause some confusion. As Mattias mention you have to change the HeaderControllerWidget group of objects them. Here is a post where I already answered where the three places you need to change are located then.http://forums.arcgis.com/threads/34685-Modify-Icon-SIZE-of-Widget-that-is-diaplayed-in-the-Header-Controller?highlight=headercontrollerWidget+icon+heightDon't forget to click the Mark as answer check on this post and to click the top arrow (promote) as shown below:
Signed in members can post, follow updates, and more. New here? Register a free account.
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.