Sketch, the character style of the left menu bar is missing.

Because it was hidden.

1. First, we open the software and click the View tab in the menu bar.

2. Then open the list of view options and click the "Toolbar" option.

3. At this point, open the toolbar dialog box and make sure to find the "Quick Start" option in the tool tab list.

4. Then, after this item is selected in the Quick Start option, the Quick Start toolbar will be displayed at the bottom of the menu bar.

5. Then click the "Close" button in the toolbar dialog box to complete the setting.