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| 1 | +# Frequentely Asked Questions |
| 2 | + |
| 3 | +## How can I edit the speed of an animation? |
| 4 | + |
| 5 | +After setting the keyframes of your animation, you can change the `animation speed` acting on the keyframes visible in the `Dope Sheet` panel. |
| 6 | +The `Dope Sheet` panel gives you a complete overview of the keyframes and the joints involved in the animation. You can access the `Dope Sheet` panel from the top left menu called `Editor Type`, select `Animation` -> `Dope Sheet`. |
| 7 | +If you click on the keyframes in the `iCub` or `iCubAction` rows you will select the keyframes for all the joints. You can refine the keyframe for the single joint by clicking on the corresponding row. |
| 8 | + |
| 9 | +- The keyframes will appear yellow when they are selected, and white when de-selected. |
| 10 | +- You will de-select the keyframes by clicking anywhere inside the timeline. |
| 11 | +- Select with the mouse the desired keyframe. |
| 12 | +- To select multiple keyframes, select the keyframes and press `Shift` at the same time. |
| 13 | +- To select all the keyframes press `A`. |
| 14 | +- If you drag the keyframe toward left or right you will change the animation speed relative to the selected keyframe. |
| 15 | +- To move multiple keyframes, select the keyframes you want to move and press `G`. |
| 16 | +- To scale the selected keyframe press `S`. |
| 17 | +- To extend the time between two keyframes, select all the keyframes (press `A`) place the mouse cursor between two keyframes, and press `E`. |
| 18 | + |
| 19 | + |
| 20 | +The following video shows some of the operations described above. |
| 21 | + |
| 22 | + |
| 23 | +https://user-images.githubusercontent.com/19833605/168836359-5c2158c9-cbb2-40d0-9231-21f5baad3cf4.mp4 |
| 24 | + |
| 25 | +## How can I edit the trajectory shape of the animation? |
| 26 | + |
| 27 | +You can also adjust the animation curves through the `Graph Editor`. The Graph Editor displays all the trajectory curves for the animation of all the joints. You can modify the animation of the single joint to have a refined behavior. You can access the Graph Editor panel from the top-left menu `Editor Type`, select `Animation` -> `Graph Editor`. |
| 28 | + |
| 29 | +- You can select the joint you want to modify from the `3D Viewport` window, the Graph Editor will display the curves the joint follows during the animation. You can directly modify the curve by dragging and dropping the keyframe. |
| 30 | +- If you select the entire robot from the `3D Viewport` window (press `A`) you will see all the curves that the joints follow, again select a keyframe and you will modify the curve for all the joints. |
| 31 | +- You can also modify the curve for the single keyframe by selecting a keyframe from the `Timeline` pane, right-click with the mouse button, choosing `Interpolation Mode`, and then choosing the desired effect. |
| 32 | + |
| 33 | +The following video shows some of the operations described above. |
| 34 | + |
| 35 | +https://user-images.githubusercontent.com/19833605/168836429-bf6d2f1f-cd3e-456c-bddc-c8fcc8a625dc.mp4 |
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