Where, oh where, is the Strikethrough button in OneNote 2013? How am I supposed to tell at a glance which tasks are complete on a page full of tasks?
The bad news: It’s not in the “basic text” tab of the Ribbon.
The good news: You can customize the Ribbon! In the screenshot below I’ve added a “MyGroup” group to the Basic Text tab of the Ribbon.
To open this editor click the “Customize Quick Access Toolbar” button (by default it’s at the top of the screen in the left corner next to the OneNote icon) then choose “More Commands”