A screenshot of Customizer's Try It mode, within a dialog overlaid on top of a Canvas course. The dialog is titled "Trying Streamlining page editing and grading", and the header includes a message reading "Try It is using a safe copy of EXMPL 101". Beneath that is a frame containing the home page of a Canvas course whose title is "EXMPL 101 (Test Copy)". Several customized areas of the home page's user interface are highlighted in yellow: a section showing recent course announcements, a section showing recent course activities, and a navbar link for Zoom. Each of these highlighted areas also has a small blue question mark badge to its top left, which can be hovered or clicked to show a tooltip with additional information about the corresponding customization. A red button in the top right corner of the dialog reads "Close Try It".