
Rotate a map tile
When you select an imported map, the element has anchor-points in each edge. In the middle you'll see a round anchor point. Drag the knob right next to it to rotate the map tile.
To rotate a map along an axis you can see inside the map drawing (say a grid line), follow these steps:
Open the settings pane using the Settings button in the lower left corner of the main document.
Select the map-tile. If you can't select the map tile, uncheck pin in the settings pane.
Look on your map tile and try to find something like a imprinted grid line that should be aligned horizontally or vertically. We will call this the alignment axis.
Click onto the rotation tool in the settings pane.
Click on a location of the alignment axis.
Click on another location of the alignment axis.
The map tile will now be rotated to be horizontally or vertically aligned along the given alignment axis.
If necessary, repeat the steps above for better results.