When a polyline is very jagged (not smooth or gently curved) it is difficult to place characters along it to create a curved label. You can set an Allow rotated as fallback option that creates a straight label when a curved label cannot be created. It rotates the straight label to match a segment near to where the curved label would have been placed. MapInfo Pro does not prevent a rotated label from crossing a polyline. Setting this option displays more labels on your map.
To allow rotated labels as the fallback for curved labels for a layer:
- Double-click the layer name in the Explorer window.
- In the Layer Properties dialog box, select the Labeling Rules tab.
- Select Curved as the orientation.
- Select the Allow rotated as fallback check box. (This option is only available for layers with lines.)
This option is set on a per layer basis. By default, this option is set to off (the check box is not selected).
When MapInfo Pro cannot draw a curved label, and draws a rotated label instead (as a fallback), the overhang percent is ignored.
Custom-located curved labels, that are created using the Label Tool (on the MAP tab) or dragged to a new location, always use the fallback option even if you did not select the Allow rotated as fallback check box for the layer. If a curved label cannot be drawn at the custom location, then a rotated label is drawn instead. The label position property set for the layer applies to how the text is placed relative to the new anchor point (the location where you click on the map).
Changing the map zoom could make a label alternate between curved and rotated as the line segments becomes less curved and more jagged looking as you zoom out on a map. As you zoom out, the label uses the rotation angle of the longest segment under the original curved text. If Allow rotated as fallback is off, then no label displays.