I fixed some bugs and update a few functions to captionAttr mel script.
It helps recording any desired attributes (e.g. final gathering Accuracy, camera F Stop, light intensity…) as caption texts on the rendered image in renderView window so you can compare the rendered images with changed attribute values. It is useful when you do series of test rendering without screen capture or note values manually.
It also saves stored images in renderView memory and caption attributes text to separate files and load them back into renderView window any time you need.