Toon Boom Onion Skin Opacity

Posted By admin On 21.04.21

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The Onion Skin view allows you to quickly configure onion skin. Using this view, you can choose the colour of previous and next drawings, which kind of marked drawings to display and whether to measure the span of onion skin per frame or per drawing. When using Advanced Onion Skin, you can also use this view to pick which drawings are included in the Onion Skin, as well as the opacity of the drawings relative to how far they are from the current frame.

You can also use the Top Light to modify your onion skin. In a Camera or Drawing view toolbar, click on the Top Light button. The Top Light dialogue box opens. Adjust the Onion Skin Opacity slider to modify the opacity value of the onion skin display. You can also change the onion skin settings by going to Stage Preferences Drawings. On the top you can find the option Enable Onion Skin for Other Elements.
Do one of the following: In the Onion Skin toolbar, click the Onion Skin button. Press Alt+O (Windows) or ⌘+Alt+O (macOS). Select View Onion Skin Show Onion Skin.
In the top menu, select Windows Toolbars Onion Skin. In the Tools toolbar, click the Onion Skin button. In the Drawing view, click the Light Table button. In the Timeline view, pull on the blue arrows to extend the number of drawings displayed in the onion skin preview.

How to access the Onion Skin view

OnionSkin is an ongoing project dedicated to all things animation, currently with an extra focus on Toon Boom and those who have previously had experience us.

Do one of the following:
- In the top-right corner of a view, click on the Add View button and select Onion Skin.
- In the top menu, select Windows > Onion Skin.
The Onion Skin view is added to your workspace.

A lot of the controls in the Onion Skin view are only accessible when using Advanced Onion Skin.

How to enable Advanced Onion Skin

Do one of the following:
- In the Tools toolbar, double-click on Onion Skin and select Advanced Onion Skin.
- In the Onion Skin view, click on the Advanced Onion Skin button.
- In the top-left corner of the Onion Skin view, open the View Menu and select Advanced Onion Skin.
The controls for the Advanced Onion Skin are now accessible in the Onion Skin view.

User Interface	Section	Description
View Menu	Open the Onion Skin view menu, which contains extra options for Advanced Onion Skin—see Onion Skin View Menu
Previous Drawings Settings
Previous drawings visibility switches	Allows you to select which drawings before the current frame to include in the Onion Skin. A drawing that is toggled on will be visible in the Onion Skin, and a drawing that is toggled up will be excluded from it. You can select a range of drawings, or include and exclude specific drawings individually. TIP '>TIP You can quickly select or deselect a range of drawings by clicking and holding on one drawing, then dragging the mouse cursor over the other drawings you want to toggle.
Previous drawings opacity sliders	Allows you to adjust the opacity scale of drawings before the current frame. Each slider represents the opacity of one drawing. By default, moving one of these sliders will move the other sliders so that the opacity remain on a gradated scale. In this case, you can start by adjusting the opacity on one end, the opacity on another end and then, if you want, adjust one of the sliders in-between to make a segmented progression. You can disable this behaviour by unchecking the Link Sliders option in the View Menu in the top-left corner of the Onion Skin view. This option is enabled by default. When disabled, you can adjust the opacity of each drawing independently.
Previous drawings colour	Allows you to select the colour in which to display the drawings before the current frame.
Onion Skin Settings
Advanced Onion Skin	Enables Advanced Onion Skin. Advanced Onion Skin allows you to select, on the fly, which drawings to include in your Onion Skin, even if those drawings are not consecutive drawings, as well as the opacity scales for the drawings before and after the current frame. The controls for selecting which drawings to display in the Onion Skin as well as their opacity sliders are only accessible when Advanced Onion Skin is enabled. Otherwise, when using regular Onion Skin, the opacity of drawings in the Onion Skin is determined by the Onion Skin settings in the Preferences dialog. The amount of drawings to include in the Onion Skin is set using the Onion Skin Add / Reduce One Previous Drawng and Onion Skin Add / Reduce One Next Drawing commands, available in the Camera and Drawing toolbars as well as in View > Onion Skin in the top menu.
Onion skin opacity slider	Allows you to set the overall opacity of all the drawings in the Onion Skin.
Include by frames or by drawings	Allows you to select whether the drawings to include in the Onion Skin are selected by frame or by drawing. By Frames:Selects the drawings to display in the Onion Skin by their frame number relative to the current frame. For example, if the Onion Skin is set to include 2 drawings before and after the current frame, it will include the drawings up to two frames before and up to two frames after the current frame, even if those drawings are the same as the one in the current frame. This is more useful for cut-out animation as it allows you to position a drawing relative to its position in adjacent frames. By Drawings:Selects the drawings to display in the Onion Skin by the amount of different drawings before and after the current frame. For example, if the Onion Skin is set to include 2 drawings before and after the current frame, this will display the nearest two different drawings before and after the drawing in the current frame in the Onion Skin, even if those drawings are further than 2 frames away from the current frame. This is more useful for frame-by-frame animation. NOTE '>NOTE When this option is enabled, the handles allowing you to adjust the extent of the Onion Skin in the Timeline view are not available.
Next Drawings Settings
Next drawings visibility switches	Allows you to select which drawings after the current frame to include in the Onion Skin. A drawing that is toggled on will be visible in the Onion Skin, and a drawing that is toggled up will be excluded from it. You can select a range of drawings, or include and exclude specific drawings individually. TIP '>TIP You can quickly select or deselect a range of drawings by clicking and holding on one drawing, then dragging the mouse cursor over the other drawings you want to toggle.
Next drawings opacity sliders	Allows you to adjust the opacity scale of drawings after the current frame. Each slider represents the opacity of one drawing. By default, moving one of these sliders will move the other sliders so that the opacity remain on a gradated scale. In this case, you can start by adjusting the opacity on one end, the opacity on another end and then, if you want, adjust one of the sliders in-between to make a segmented progression. You can disable this behaviour by unchecking the Link Sliders option in the View Menu in the top-left corner of the Onion Skin view. This option is enabled by default. When disabled, you can adjust the opacity of each drawing independently.
Next drawings colour	Allows you to select the colour in which to display the drawings after the current frame.
Marked Drawings Settings
Show Key drawings in Onion Skin	Only displays drawings marked as key drawings in the Onion Skin.
Show Breakdown drawings in Onion Skin	Only displays drawings marked as breakdowns in the Onion Skin.
Show In-between drawings in Onion Skin	Only displays drawings with no marker in the Onion Skin. Drawings with no marker are considered in-betweens.
Show RetakeKey drawings in Onion Skin	Only displays drawings marked as retake key drawings in the Onion Skin.
Show RetakeBD drawings in Onion Skin	Only displays drawings marked as retake breakdowns in the Onion Skin.
Show RetakeIB drawings in Onion Skin	Only displays drawings marked as retake in-betweens in the Onion Skin.

Onion Skinning and Advanced Onion Skinning

T-ANIMPA-006-008a

You can enable the onion skin to see your previous and next drawings as reference.

Author

Frank Summers
2D Animator

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Material

To complete this topic, you will need the following from the sample material you downloaded:

MO-ANIMPA-006011-rough-key-poses
MO-ANIMPA-006001-colour-model-scene

How to enable the onion skin

In the Timeline view, select the layer you want to draw on and the frame in which you want to draw.
Do one of the following:
- In the Tools toolbar, click on the Onion Skin button.
- In the Timeline view, click on the Onion Skin button left of the layer name.
- In the top menu, select View > Onion Skin > Show Onion Skin.
- Press Alt + O.
Onion Skin will be enabled. By default, it will display two frames before and two drawings after the current drawing.

How to add the Onion Skin view to your workspace

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Do one of the following:
- In the top-right corner of a view, click on the Add View button and select Onion Skin.
- In the top menu, select Windows > Onion Skin.
The Onion Skin view is added to your workspace.

NOTE'>NOTEWhen Advanced Onion Skin is enabled, you cannot use the Onion Skin handles in the Timeline view, nor the Onion Skin Add/Remove Previous/Next Drawing buttons to adjust which drawings are displayed in the Onion Skin. You can only select the drawings to display in the Onion Skin using the Onion Skin view.