You can choose a shape for a raster area from the 15 predefined ones shown here.
Naturally a circle will be distorted into an ellipse if the raster area frame is not an exact square. To create a square frame, draw and select a frame; enter identical values in the dX and dY fields of the Coordinate display, and use proportional sizing when resizing the frame. Operation is the same as for line frames: Select a shape and draw the raster area frame. The currently selected shape will appear selected (inverse video).
This function area shows further shapes that can be used to create raster areas. The currently active raster shape icon will be shown as selected.
