Copy Section Between Locators (Selection)
Copying a section is clear. The difference between “Selection” and “Global” — the two options for this action — isn’t clear to me yet.
Copying the selection between locators means the selected track or region. Copying global copies everything on all tracks. Subsequent paste commands can be used to see the difference.
Add or remove gaps in a Logic Pro arrangement — Apple Support
Choose Edit > Cut/Insert Time > Copy Section Between Locators (or use the Copy Section Between Locators (Global) key command).