You indeed can change the Menu Item's Type to whatever you want, even after they have been created.
If, for instance, you want to change the Blog Section of a Menu link, go to the Control Panel->Menus Menu->[menuname]->Menu Item Manager and edit the Menu Item. Select the Change Type button and choose the new style of Menu Item Type from the available list. Thereafter, alter the Details and Parameters to reconfigure the display for the new selection as you require it.
Do you want to show off your new Joomla! Web site? Visit the Site Showcase section of our forum.
If you think working with Joomla is fun, wait until you start working on it. We're passionate about helping Joomla users become contributors. There are many ways you can help Joomla's development:
- Submit news about Joomla. We syndicate Joomla-related news on JoomlaConnectTM. If you have Joomla news that you would like to share with the community, find out how to get connected here.
- Report bugs and request features in our trackers. Please read Reporting Bugs, for details on how we like our bug reports served up
- Submit patches for new and/or fixed behaviour. Please read Submitting Patches, for details on how to submit a patch.
- Join the developer forums and share your ideas for how to improve Joomla. We're always open to suggestions, although we're likely to be sceptical of large-scale suggestions without some code to back it up.
- Join any of the Joomla Working Groups and bring your personal expertise to the Joomla community.
These are just a few ways you can contribute. See Contribute to Joomla for many more ways.