Slot Color and Transparency Animation

1. Switch to animation mode

Automatic Keyframes

1. Turn on the auto keyframe button in the toolbar on the left side of the timeline panel.
2. Move the playhead to where you want to set a keyframe.
3. Select a slot and modify its color.
4. Keyframes will automatically appear on the timeline.
5. Drag the playhead with the mouse to observe the animation effect.

Manual Keyframes

1. Turn off the auto keyframe button in the toolbar on the left side of the timeline panel.
2. Move the playhead to where you want to set a keyframe.
3. Select a slot and modify its color.
4. In the properties panel, the small flag icon next to the color property turns yellow. Click the flag button to manually set a keyframe.
5. The flag turns blue, indicating that there is a keyframe at the current playhead position.
6. Drag the playhead with the mouse to observe the animation effect.