Feature request: Upload a image to use as mask.

[neocogent]

This is a great tool and Thank you for making it.

The only thing I find very cumbersome is clicking on many many cells to try and create a mask. It would great if we could make some shape in Inkscape or other tools and upload it to act as a mask (stretched to fit bounds). So could easy do hearts or car shapes or what have you without being much of an artist or clicking around for ages.

Or if too hard then maybe have an option where moving the mouse over an area toggles cells. I feel like I'm wearing out my mouse button.

Just my two cents and Thanks for listening.

[marieneig]

Hi, upvoting this feature, but in the mean time is it possible to save the mask and reuse it? Thanks!