Ruler for drawing lines
Please add a ruler like the existing one in Apple's Notes. For example drawing graphs the existing auto shape function isn't perfect for that.
And angles (protractor)
Raihan Masroor commented
Would like to add to this feature, that the ruler should give me the ability to not only draw lines, but also measure and draw lines or calculate measurements between object and have a scalable ruler.
I like this idea. GoodNotesis already great and this features will be simple to implement.
I would add another idea - allow "Align to Grid" where the page template is the grid.