This plugin allows you to replace Craft's default horizontal tabs with vertical tabs on Entry, Category and User edit pages in the control panel.
Once the plugin is installed, it will be enabled for Entries, Categories and Users. If you'd like to disable it for certain Element types, go to Settings and, under Plugins, click on Vertical Tabs. You can then enable/disable Vertical Tabs as desired.
To install this plugin, search for its package name on the Plugin Store and click “Install”.