I am seeing this kind of effect in waveform window on the signal name when pressing CTRL+left click:
Just wanted to delete the signal, but it seems that the usual delete way by left clicking on the signal name and then pressing ctrl+x does not work anymore. Its something related to the latest updates.
Then I need to better familiarize with the delete procedure of a trace. It seems, at least so far for me, that it is more ambiguous than in the precedent versions…
Update Qspice and should fix what you mentioned. The new feature on 04/21/2025 allow drag and drop data traces between different waveform viewers. Currently, you can drag and drop data traces between plot pane windows and viewers. Hold Ctrl to drag and drop can copy traces.