When setting the size of the map, let me tell Roll20 how many squares an area represents

Currently, there either is no good way (at least not that is obvious to me) to give Roll20 the relevant information about my map to draw the proper-sized grid on it. I know that there's the tool that lets me select a 3x3 area, but if my selection is a few pixels off (which happens most of the time for me), I still need to make micro-adjustments to the pixel value until I get it right. My alternative is to say "I know this map is 3600px wide and that there are 18 squares across, so let me do the math, and I can plug that number in." This seems silly! Roll20 can do that math so much quicker than me. Some suggested improvements: Rather than telling me to select a 3x3 area, let me select an area and tell Roll20 how many squares across it is. This is much less prone to error than the 3x3 selection where a few pixels difference can compound over a very large map. In the map settings, when I set the size of the canvas, I should also be able to say there how many squares across the map is. Divide the canvas by that amount, and you immediately know my grid size. Thanks for listening!

You do know about the Page Settings? <a href="https://wiki.roll20.net/Page_Settings#Page_Size" rel="nofollow">https://wiki.roll20.net/Page_Settings#Page_Size</a> You can set units or pixels, as you wish, and Roll20 does do the math.

Yes, I know about that. The issue is that it's either/or, not both. The issue is that it assumes 70px per square. Yes, you can change that lower down the page, but the number that goes into that last value is an unknown to the user. I offered an example above, and I'm not sure how the current options solve it. The tool that lets me select a 3x3 area was obviously an attempt at solving the issue I'm describing. But A) it's prone to user error where one pixel off compounds over large maps and B) is difficult to use if I'm using a map that doesn't have a visible grid on it already. If I'm mistaken, let me know. Suppose you have a map that you bought that's 4500px across and is 23 squares across. What's the best current method of getting the Roll20 grid to line up with where it's supposed to on this map?

Right click on the image&gt;advanced&gt;set dimensions and enter 1610px (70 pixels x23 grid squares) for the width.&nbsp; That should match your image to the default dimensions of the Roll20 grid.&nbsp; Drag it to snap to grid if the edge of the image is at the edge of a grid square.&nbsp; If the grid on the image has partial squares around the edge, you right click on the image and set is as "is drawing" (I think that is the label, didn't log in to check) which turns off snap to grid to allow you to easily drag it for exact placement. At least, that is what I would do.

I see two issues with your solution: #1, I don't have the benefit of the entire resolution of my image and #2, you had to do the math of 23x70. You'd also have to do the math for the other direction.&nbsp; JavaScript can determine the size of the image in pixels. I should be able to tell Roll20 "I don't care what the square size is, give me 23 squares across".

I am still not understanding your issue. I can set the size of a map page or an image by units without ever knowing the pixels. Like you are suggesting, Roll20 does the math. As an aside, I would caution against using very high resolution maps, however. There is often little to no benefit to the naked human eye in most cases, at a cost in bandwidth/game responsiveness/storage quota. EDIT: Some screenshots just to be clear: Setting a page size with units, I can fill in the two boxes with the number of squares without knowing the numbers that go in the other boxes: Once you place an image on the map layer, you can right-click it and click Advanced -&gt; Set Dimensions: Then change the dropdown from pixels to units:

I'm not sure why I seem unable to make the issue more clear. In that equation above (25 x 70px = 1750px) - is the 70px that's the frustrating part. It's an equation! I should be able to adjust the other two numbers to have the value of 70px changed! "I want my page and map both to be 1783px and 4 squares across." Yes, that's a weird request, but I'm trying to show extremes at this point. Right now, there's not a good way to accomplish this.

I guess I can see wanting to do that, but if you allow people to work from that direction, then you end up with grid pixel counts with decimals in them like your example (445.75px).&nbsp; While that might not look too bad over 4 (well 3, I guess) grid lines, I'm not sure how it would look with a more normal count of grid squares. &nbsp; I would think having whole numbers for the grid pixel count would be desirable.&nbsp; How well would the grid be rendered if it was 71.32 pixels per grid square (your example applied over 25 grid squares)? I don't know.&nbsp; It would probably depend a great deal on the display it was being rendered on, but maybe it would be just fine.

+1 for this. Having aligned lots of scanned maps over the years, the 3 by 3 align to grid function, sometimes doesn't work well with image in question.&nbsp; Which is to say, that yes, with a lot of manual vertical and horizontal stretching, squishing and pushing the image around, I can get it to more or less work. But allowing us to set something other than 3 by 3 on the align to grid tool would be a nice convenience.

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