You can load an isometric map image into any page, but if you want an isometric grid you’ll have to have a Roll20 Pro subscription. <a href="https://help.roll20.net/hc/en-us/articles/4416143791767-Map-Grid-Types#h_01H9J8293BAVQAC4TF49R5EVHT" rel="nofollow">https://help.roll20.net/hc/en-us/articles/4416143791767-Map-Grid-Types#h_01H9J8293BAVQAC4TF49R5EVHT</a>