Originally Posted by
Nieko
Gene: in GMDL, bottom left, there is an "Advanced" button. Click that, then click "Get Numbers".
You will see the fields below that button being filled in. If you have both Portland and Los Angeles in view, you'll have these numbers:
zoom: 12
x: 4
y: 11
min zoom: 0
Now this minimum zoom will decide how big the maps will be. Just increase it to 7, e.g., and you'll be able to zoom in 5 times (12-7=5). Such maps are usually ~15-30MB in size.
P.S.: you can reduce the map size by unchecking the tiles you won't need in the preview. Perhaps this reduction even allows you to have another level of detail.