Step 1. Go to My Account. You are free to change any page type layout inclucing My Home, My Blog, My Favorite, My QA, My Shop and My Friends.
Step 2. At My Account page, you may create any new HTML elements first. For example, if you want to show your own left panel in your blog pages, you may create a new HTML element called Blog-Left and choose its position to Left.
Step 3. At My Account page, choose the page type and page layout and HTML element for the position. Using above example, you would choose page type to Blog, page layout to Top Left Middle and then choose Left to Blog-Left you created. Click Apply & Build.
It's done. Your blog main page will show your own left panel instead of system default left panel. You may reset to default or change to new layout at anytime you want. It's powerful and easy.