Quick Access Toolbar is a toolbar with a set of commands for you to quickly finish your work. You can add or remove command. If you do not like the layout of the Quick Access Toolbar, you can reset to the default setting. Please see the steps below:
Step 1: Click the small triangle at the end of the Quick Access Toolbar;
Step 2: In the drop down list, click "More commands";
Step 3: In the new window, click "Reset", then select "Reset only Quick Access Toolbar" from the drop down list, which is at the bottom-right corner;
Step 4: Click "OK" to apply the changes.