Touch Screen POV

while use this site on my tab I have notice followings bugs

1. Not able to choose drawing tool while clicking the icon. All the drawing tool should have been appeared when we click the icon but only icon drawing tool has been selected not others

2. Zooming in and zooming out feel very sloppy. when we try to use two fingers to zoom in or out its change chart position

3. Right click option always appears out of no where. It should be appear only on double click on blank space

4. Feature: It should have a separate button for full screen

5. Drawing anything while using tab is very very difficult

   
   Thanks if you need video for above mention bug please let me know