| | 1 | Put attached buttons in appearance HUD right after the opacity slider. Put the following tooltip text. |
| | 2 | |
| | 3 | * "Fade in after the current timeline position" |
| | 4 | * "Fade out after the current timeline position" |
| | 5 | |
| | 6 | For now, these buttons should do the following |
| | 7 | * Fade in - from the beginning of the timeline to the current playhead, the opacity channel is set to 0. The value is incremented with 1 each 10 milliseconds (for one second, the values are changed from 1 to 100, the opacity is set to 100 for the rest of the channel, where values are 100 or 0) |
| | 8 | * Fade out - from the current playhead position and value, values are decremented to 0 each 10 milliseconds. The rest of the channel is set to 0. |
