Add a 'No Stroke' option (checkbox or color option) to the color picker to easily remove stroke from shapes, or allow inputting opacity into a textbox, or improve the slider for faster opacity adjustments.
Current method to remove stroke from a shape : Select shape Click on stroke option Reduce opacity to 0 by clicking 10 times, as the slider reduces by 10% only. Suggested solutions: 1. Add a 'No Stroke' option either as a checkbox or as a color option shown by a box with a red cross as in Adobe Photoshop & Illustrator 2. Add an option to input the opacity into a textbox 3. Improve the slider so it can be made zero more quickly/smoothly. 