How do I edit the settings of several cores at once in the expert window?

Q: How do I edit the settings of several cores at once in the expert window?

In the core settings expert window, a list of cores is shown on the left. Ctrl+click adds a core to the selection, Shift+click selects a range, and “OK” writes the changed parameters to all selected cores. If some cores did not accept the page, the window stays open, and the changes are saved.

Core settings

A core's own settings: start and restart, the emulator, take-profit, trailing stop, V-Stop, icebergs and sound alerts.