Two buttons to collapse or expand all visible sections within the content editor and template manager interfaces.
Update: this extension was written for Sitecore 6.x. I'm told it possibly works for 7.x and for sure does NOT work with 8.x or above. I do not have any plans to update the extension at this time.
This extension provides two buttons to collapse all or expand all sections within a sitecore content editor or template manager right hand pane that can be toggled. It only acts on the topmost iframe and only if there's expandable/collapsable sections present. Currently this extension only functions if the URL contains "sitecore" in it. If you have modified your sitecore url you can update the manifest file for the extension to include a more appropriate "matches" setting.
To use the extension, simply load up the content editor, navigate to an item that has sections that can be toggled, click the extension icon and select either "Collapse All" or "Expand All".
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This extension is provided "as is" with no warranty and I will not be held responsible for any damages caused by installing or using this extension.