Home Page blocks.

Home page blocks in Magento are controlled by the Magento administration panel. So all change should be done there.

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1. Open Magento admin panel

2. Go to CMS > Pages > Home Page

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3. Open the Design tab, in the Layout Update XML field you can see the home page blocks code.

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Here are some examples:

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Popular Tags block

    <block  type="tag/popular" name="tags_popular"  template="tag/popular.phtml"/>
  

Community Poll block

          <block  type="poll/activePoll" name="right.poll">
<action method="setPollTemplate"><template>poll/active.phtml</template><type>poll</type></action>
<action method="setPollTemplate"><template>poll/result.phtml</template><type>results</type></action>
</block>
        

Newsletter Sign-Up block

          <block  type="newsletter/subscribe" name="left.newsletter"  template="newsletter/subscribe.phtml"/>
        

Sidebar callout(banner) block

          <block  type="core/template" name="left.permanent.callout"  template="callouts/left_col.phtml">
  <action  method="setImgSrc"><src>images/media/col_left_callout.jpg</src></action>
  <action  method="setImgAlt" translate="alt"  module="catalog"><alt>iPod  classic</alt></action>
  <action  method="setLinkUrl"><url>storage.html</url></action>
  </block>
        

?You can change the blocks order or delete any of the blocks editing the XML code.

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Feel free to check the detailed video tutorial below:

How to manager home page sidebar blocks

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來源： http://www.templatemonster.com/help/how-to-manage-home-page-sidebar-blocks.html

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Turning On and Off Magento's Default Blocks

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Common Elements You Can Turn Off (and On) Via the Admin Panel

Below are some of the blocks and elements that you can turn off using the Admin Panel. The key advantages of turning off elements using the Admin Panel are that you don’t have to mess with any code and doing so ensures your changes are independent of the theme being used. Turning blocks on and off via the Admin Panel also makes the change ubiquitous across the site—no danger of a block or stray link accidently showing up on a little trafficked page you didn’t remember to change the code for—and you can reverse the process, turning the block back on whenever desired.

Header	Remove/Edit the Default welcome message ADMIN: System → Configuration → Design tab → Header panel. Edit or delete the contents of the "Welcome Text" field.
Footer
	Remove/edit the CMS-based links (About us | Customer Service) ADMIN: CMS → Static Blocks. Disable or modify the "footer_links" block. Remove Site Map link (and site map itself) ADMIN: System→Configuration→Catalog tab→SEO panel. Set “Autogenerated Site Map” to "Disable." Remove Popular Search Terms link (and search terms page) ADMIN: System→Configuration→Catalog tab→SEO panel. Set “Popular Search Terms” to "Disable." Remove Contact us link (and contact form) ADMIN: System → Configuration → Contacts tab. Set "Enable Contact Us" field to "No." Remove RSS link and functionality ADMIN: System→Configuration→RSS Feeds tab→RSS Config panel. Set “Enable RSS” to "Disable." Remove/edit the Copyright notice ADMIN: System → Configuration → Design tab → Footer panel. Edit or delete the contents of the "Copyright" field. Remove "Keep Magento healthy" message This message is hard-coded in the current theme's template/page/html/footer.phtml file and can be edited there. As a temporary workaround, you can hide this message using CSS. Go to ADMIN: System → Configuration → Design tab → Footer panel. In the "Miscellaneous HTML" field insert the following CSS statement: <style>p.bugs {display: none;}</style>
Newsletter	Remove the sign up block and disable functionality ADMIN: System → Configuration → Advanced tab. Set “Mage_Newsletter” to "Disable."
Poll	Disable all polls ADMIN: System → Configuration → Advanced tab. Set “Mage_Poll” to "Disable." Remove current poll but leave functionality available for later ADMIN: CMS → Polls. Set “Status” of the current poll to “Closed”.
PayPal logo	Remove logo only (leave functionality available) ADMIN: System → Configuration → PayPal tab → Frontend Experience panel. Set “PayPal Product Logo” to “No logo.”
Wishlist	Remove top link and disable functionlity ADMIN: System → Configuration → Advanced tab. Set “Mage_Wishlist” to "Disable."
Reviews	Remove product page links and disable functionality ADMIN: System → Configuration → Advanced tab. Set “Mage_Review” to "Disable."
Tags	Remove tag cloud and disable product page functionality ADMIN: System → Configuration → Advanced tab. Set “Mage_Tag” to "Disable."
Cart Sidebar	Remove sidebar only (leave functionality available) ADMIN: System → Configuration → Checkout tab → Shopping Cart Sidebar panel. Set “Display Shopping Cart Sidebar” to “No.”

Common Elements You Can Turn Off Via the Layout Files

Some Magento blocks are controlled by larger modules and cannot be turned on and off quite so neatly using just the Admin Panel. Instead, those blocks are best turned off using the layout (xml) files for your theme. Below is a list of some of these blocks for the default design package. You may have additional blocks in your design package and theme, but you can use this a guidance for determining where the blocks you're working with are likely to be declared. The section following this provides some instructions on how to do disable these blocks. As with using the Admin Panel, disabling a module at the layout level will ensure that it’s truly off across your entire site.

Header	Cart & Checkout links Set in base/default/layout/checkout.xml My Account, Log In & Log Out links Set in base/default/layout/customer.xml
Left Callout banner (the dog)	Sidebar block Set in base/default/layout/catalog.xml
Right Callout banner (back to school)	Sidebar block Set in base/default/layout/catalog.xml
Compare Products sidebar	Sidebar block Set in base/default/ layout/catalog.xml Product and category page links The “Add to compare” link on the product page is set in template/catalog/product/add-to.phtml and needs to be removed separately. As a temporary workaround, you can hide this message using CSS. Go to ADMIN: System → Configuration → Design tab → Footer panel. In the "Miscellaneous HTML" field insert the following CSS statement: <style>p.link-compare {display: none;}</style>
Cart	Sidebar block Set in base/default/layout/checkout.xml Top links--cart and checkout Set in base/default/layout/checkout.xml
Recently Viewed Products sidebar	Sidebar block Set in base/default/layout/report.xml
Recently Compared Products sidebar	Sidebar block Set in base/default/layout/report.xml:

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來源： http://www.magentocommerce.com/knowledge-base/entry/turning-on-off-magentos-content-blocks

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magento 管理首頁側欄 How to manage home page sidebar blocks