Using Replace Mode
When you enable Replace Mode, you can quickly replace a Timeline clip by dragging a clip from the Library onto the clip that you want to replace in the Timeline. It is particularly useful when you are using templates and you want to replace several placeholder clips. You can toggle Replace Mode on and off from the Timeline toolbar at any time. When Replace Mode is not active, you can replace timeline clips with library clips by pressing and holding the CTRL key while you drag and drop.
* To toggle Replace Mode on and off
On the Timeline toolbar, click the Replace Mode button .
The button is blue when the mode is active.
When you add a template to the Timeline, a message displays that lets you activate Replace Mode. You enable or disable this message from Settings > Preferences. Click the General tab, and in the Project area, mark or unmark the Show Replace Mode message when adding an instant project to the Timeline check box.