Changing grid scales

This has probably already been done/suggested or what have you, but the 1 inch = 5 feet thing is something that to me as a GM is not terribly useful. I can work around it and so forth and so on, but would it be possible to at some point make it possible to set a custom unit of measure per square/hex? Be it metric, fantastic, or simply other units in the Imperial system (yards, for instance). Say, for example, I wanted to have an overland world map the players could reference for their day to day travel, and each hex was a mile or kilometer or league, it would be nice to have that option for that map, and then to have the smaller scale maps for the combat encounters. Is this a feature that is being worked on currently, and if so, is it one that will come soon? Because I've got a campaign or two I'm planning on moving over to this system and those features would be quite handy.

Thank you very much for your response, I look forward to using this with my gaming group in the near future.

Sounds interesting. Will this be editable, or will we just verbally let our players know? Why use pixels since images are scaled to match grid? Wouldn't be easier to use the grid? I.E. one square/hex = 1 meter

Because pixels are the only significant units when you are on a screen. If you make your maps yourself, meters, inches or wathever have no meaning. The only things that make sense are one square (the visible unit dividing the screen) and the pixels (the sizes of anything on the screen). If you don't have those, you can only fudge and eyeball what you do, which turns easy work into very difficult work. You can label your square one meter, one league or one wathever, it has no influence on your graphic element, which is just a number of pixels.

I understand that, but it always seems like my images were rescaled in Roll20, but I don't remember what dpi I made them in. Eyeballing was pretty easy with tile as long as there was no border. Line up top left square and scale. I'll try to pay more attention to dpi and importing when I make more images. I think my confusion comes in when zooming. Maybe just add a little more like: "70 pixels equals 1 unit or grid space at 100 % zoom" I suppose this that should've been obvious but I was getting sleepy last night. I do like the way Roll20 shows 1 square equals 5 feet and it would be great if the page had a setting where a GM could insert the scale, either in squares or 70 pixels at 100% zoom.