You can add a set amount of frames at the end of your scene using the Add Frames at End dialog.
NOTE You can also extend your scene's length by entering its total length or by manipulating the scene length bracket in the Timeline view—see Setting the Scene Length.
How to add frames at the start or end of a scene
- In the top menu, select Scene > Frames > Add Frames at End.
The Add Frames dialog box opens.
- In the Number of Frames to Add field, enter the number of frames to add to the scene.
- Click OK.