1. Create a new page in Roll20.

2. Under the Page Settings for the new page, edit the page size to 4300px width x 5200 px high.

3. If necessary, change the page scale (also under Page Settings) to a Square type, D&D 5E/4E Measurement, and a Cell Width of 70px.

3. Drag and drop one of the maps onto the page. Move it to the Map layer if it isn’t there already.

4. Right-click on the map and select Advanced / Set Dimensions, then enter 4200 pixels wide x 5040 height.

5. Finally, if necessary, hold down the Option/Alt key and use the cursor keys to nudge the map up, down, left, or right a pixel at a time to get it aligned exactly with Roll20’s grids.

6. Repeat for the other four JPGs! (Maps 3.1 and 3.2 share one JPG because they’re smaller.)