The timeline is used to control the scene objects over time.
The top right part of the timeline shows the current editing range of the objects display.
Below the time ruler each object of the scene is represented as a separate track with the possibility to change its starting time and/or duration, add keyframes to create animated effects.
The timeline consists of four main panels:
On top there is the ruler that allows you to browse through the frames.
The left center panel displays the object currently selected in the tree. The details displayed in this area change as the selection changes. It is possible to define the detail level for the scene objects to be displayed on the timeline. If the "Show all parameters" option from the "Edit" main menu is selected, all parameters of the selected object will be displayed. If this option is deselected, only animated parameters (that have any keyframes defined) of the object are displayed. To display all objects added to the CG scene on the timeline, enable the "Show all objects" option from the "Edit" main menu. If this option is not selected, only the object selected in the tree and its nested objects will be displayed in the objects panel of the timeline.
In the center panel, you can see objects (or their parameters) as layers in a classic timeline form, where it is possible to interact with and alter their start time and/or duration.
On the bottommost panel the time scale control is placed allowing you to change the time scale on the timeline and scroll to the desired part of it.
Moving the Current Frame Position
There are several ways to move to the desired frame position:
Click on the desired location on the timeline to jump to that location.
Left-click the animation position slider and holding it move the slider to the desired timeline location.
Hit Space to start/stop playing.
Use the Ctrl+→ or Ctrl+← shortcuts to jump the animation position slider to the next or previous keyframe respectively.
There is a "Snap to objects" option for the timeline slider. While moving the slider to the desired timeline location, it will snap to the nearest keyframe or the start/end of the object track. This option can be selected in the "Edit" main menu.
Working with the Objects on the Timeline
Changing the Duration
To change the object track duration, place the mouse cursor over the start or the end of the track. The cursor will change its icon accordingly:
Press the left mouse button and drag it to the desired position. The track duration will change accordingly.
You can also change the temporal position of the object by dragging it to the desired position on the timeline. To do this, click on the object track and drag it to the required position. The cursor icon changes to the double sided arrow while dragging.