to turn on Catch mode.
Do one of the following:
In the Tracks area, Event Editor, Step Editor, or Score Editor, choose View > Link > Content.
In the Piano Roll Editor, choose View > Link.
Control-click the Catch button, then choose “Catch Content by Position if Catch and Link are Enabled” from the shortcut menu.
Note: To set Content Catch as the default for newly opened areas, turn on the Logic Pro > Settings > General > Catch > “Catch content by position if Catch and Link are enabled” setting.
Download the guides:
Logic Pro User Guide: PDF