I’ve been using WSJT-X for a very long time, since it was called JT65-HF and one thing I’ve always found a little tricky was making fine adjustments to the Pwr control slider. I often want to make small adjustments and I’ve found that clicking on the slider itself can cause much larger adjustments than required. If you don’t click exactly on the centre, the slider jumps.
I just found out that it’s possible to adjust the slider using a mouse wheel, or a gesture using a trackpad which does the same as a mouse wheel. This may be old news to a lot of people but if you don’t already know it, it’s an absolute game changer. I can now just hover the mouse somewhere near the slider and move it up and down smoothly, without it jumping all over the place.
I wish I’d known this years ago!

Great tip for using WSJT-X