Click and drag to move the grid. Scroll to zoom (use fullscreen). I think it works on mobile too? Idk. Just a prototype. Unfortunately, there is a limit to how far you can zoom in and that's because Scratch only uses floating points which leads to weird gridlines at high zooms. Use this if u want: https://turbowarp.org/1264245705?hqpen
Use with credit if u want (although its not finalised, I'll put instructions in the final one). This was inspired by desmos (https://www.desmos.com/calculator) except I didn't rly like their colour scheme. Another issue with desmos was that grids visible snap into appearance when u zoom (kinda like LOD popping) but I fixed that by fading them in. Another thing I added is smooth zooming.