To change the links in the first navigation bar, go to Design--Edit Html and find this code, below it you can add the category links and sub menu links.
While for the second menu bar follow the same steps, look for this code and below it you can insert the relevant categories and sub-categories -
The template has a neat slider to showcase your top or featured content in a thumbnail format with post summary below it. To modify the 5 slides, access your Edit Html, and search for this code, this is the code for Slide 1 -
<img class='sidim' src='http://1.bp.blogspot.com/_4HKUHirY_2U/TOZFBzP5MjI/AAAAAAAAH1U/lKMXgEk5D2g/s1600/1.jpeg'/>
<h2><a href='SLIDE-1-LINK-HERE'>Slide 1 Title</a></h2>
<p>Go to Blogger edit html and replace these slide 1 description with your own words. ...</p>
Follow the instructions given in the code for slide 1 and similarly carry out the steps for remaining slides.
The sidebar on the right includes the internal search box, featured video and the default blogger widgets like Recent Posts etc. You will get more space to display your content as this theme also has a 4 column footer. At the bottom of the template after the footer column there are links to 'Subscribe to RSS' and 'Follow on Twitter', so from Edit Html add your twitter id in the code below and save the changes -
Download the Drakon Blogger Theme