We've recently added some new options to the Draw & Zoom tools so you can choose the drawing width for the currently selected tool. After enabling the Draw & Zoom tools by clicking the pen icon or using the hotkey you'll see a menu appear at the top of the screen. The menu has a number showing the current width for the selected tool. Clicking the menu will give you some pre-selected widths. If you'd like to fine tune the width then you can hold down the Control key in windows or Command key on Mac and then use the plus and minus keys to increase or decrease the width. The width selection will be an option with most tools except for the Highlight tool which will instead allow you to choose the opacity of the highlight box that you draw.