todo.txt

html todo:
fix undo button // https://codepen.io/abidibo/pen/rmGBc
	undo current state: first undo doesnt work, each subsequent one does until there is one action left
display preview of border

js todo:
fix save image?
opacity?
info: what buttons do, settings, contact/share
custom color, color picker





improve UI?
help button with modal popup?
add eraser icon that just selects white
fix palette button showing colors on first click
manually enter color?

help modal labeled screenshot of what buttons do
or: use popovers for titles of buttons (or both)
https://stackoverflow.com/questions/2011142/how-to-change-the-style-of-the-title-attribute-inside-an-anchor-tag

put image data in the url... somehow...
preview radius size when dragging it

enter color hex? color picker? pipet?

draw lines mode?
fix mobile

more options:
lighten/darken?
scale/select/duplicate?
fill bucket?
globalAlpha
add text
add shadows
add gradients
transforming (translating, rotating, skewing, scaling...)
image editing with these: https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Compositing

make range input prettier
move tools somewhere else in UI
add tooltips
add color picker