Make "Modulate alpha by intensity" pos/neg aware
The "Modulate alpha by intensity" almost allows users to do the AFNI-recommended visualisation of %BOLD/units values modulated by a statistic map. What is missing is easy visualisation of both positive and negative values (which is part of the recommendation).
Suggestion: Make the modulation follow according to the absolute value of the (alpha) source image... either optionally or as linked to the use of activation of the negative color map on the source image.
As another suggestion, you might make your life easier if you remove the "modulate range" sliders from the Overlay Display Settings, and simply take the range from the display range of the source image. In this way, when there is only a positive color bar, you can map alpha by the Min/Max display range; and when negative color bar is activated, map alpha from abs(source).
Ref: Taylor, P. A., Reynolds, R. C., Calhoun, V., Gonzalez-Castillo, J., Handwerker, D. A., Bandettini, P. A., … Chen, G. (2023). Highlight results, don’t hide them: Enhance interpretation, reduce biases and improve reproducibility. NeuroImage, 274(October 2022), 120138. https://doi.org/10.1016/j.neuroimage.2023.120138