How do I change a parameter for many strategies at once if search takes only one name?

Q: How do I change a parameter for many strategies at once if search takes only one name?

Search matches a single substring of the name; there is no list input and no “!”. Filter the tree (by side, type or exchange), press Ctrl+A to select everything visible, and Ctrl-click to deselect what you don't need (Shift-click selects a range). An edit to a parameter goes to all the selected strategies, including those on other cores. Before this, expand the cores you need: only what is drawn gets selected.

Strategies

The tree of strategies on every connected core: search and filter them, create, copy and paste, and see which ones are running.