Because I have poor eyesight I quickly noticed that some darktable YouTube videos appear to have a screen magnifier effect that is especially valuable when it is applied to the modules panel in darkroom. I would like to understand how this is implemented:
On my Linux Mint install that effect is not achieved by the application of desktop zoom in the visual tab of the accessibility option within system setting. That function enlarges an area of the screen uniformly. What I am seeing, on certain YouTube videos, is as if the modules panel alone has become a separate window which is enlarged so that it appears to overlap the centre image display area.
How is that done ?