+/* W Ratio, H Ratio
+Sets the ratio of the new canvas size (W, H) to the old (previous) canvas size (W, H).
+The new canvas size is recalculated based upon a certain factor in the W Ratio,
+H Ratio fields. A practical use-case: The current resolution is 640x480, and for some reason
+you want it to be 1.33 times wider. You don't have to calculate what 640x1.33 is;
+you type 1.33 into the "W" input instead, and Cinelerra calculates it for you. */
+