Classes

Classes are a way to identify your items and instances, and categorize them further by using Attributes.

You can create an Object class, which is used for object instances, and you can create a Tag class, which is used to classify items as a whole. Learn more.

Assign classes or attributes

When in the Video Editor, you can assign a class to the instance you’re looking at. You may also assign attributes, if the class has any.

You can assign a class in a number of ways.

Method 1 - from within the instance

1. In the Video Editor, create an instance with any annotation tool (except the Free text tag).
2. Right-click the instance to open up a menu or find the instance in the Right panel.
3. Select a class from the dropdown.
4. Select attributes, if applicable.

Method 2 - selecting a class beforehand

Select a class from the Default class feature in the left panel before you annotate. Your annotation tools will now automatically assign the selected class to any new instances you create.

Method 3 - eyedropper and bucket

1. In the Video Editor, select the Eyedropper tool. (If you can’t see it, press I on the keyboard or right-click on the Free text tag tool to find it).
2. Click on the instance that has a class you want to replicate. The Eyedropper tool will change to the Bucket tool.
3. With the Bucket, click on the instances you want to assign the selected class to.

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• After you’ve used the Bucket tool, if you switch to other tools then back to the Bucket, it will keep using the last class you selected with the Eyedropper.
• You can manually switch to the Bucket tool from the left panel, or by pressing B on the keyboard.

Method 4 - from the timeline/frames

You can add an attribute over any empty space or keyframe on an instance in the bottom panel (the item's timeline or frames).

1. Find the instance you want to add an attribute to in the bottom panel.
2. Hover over an empty spot or an existing keyframe on that instance.
3. In the instance tooltip, click the Edit button.
4. Select the attribute that you want to add.

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About keyframe attributes

• If you want to add one attribute to the entire instance, you must add it to the first keyframe of the instance. It will apply all the way until the end of the instance's corresponding bar in the bottom panel.
• Adding an attribute to another keyframe in the instance will replace the attribute that carries on throughout the rest of the instance's timeline/frames. For example, let's say you set the Black attribute to the first keyframe. Halfway through the instance's timeline, you had another keyframe that you assigned the Red attribute to. This means that for the rest of the instance's timeline, all the way until the final keyframe, the instance will have the Red attribute.

Change a class or attribute

You can change a class or attribute by right-clicking the instance or finding it in the right panel. From the class/attribute dropdown, select a different option.

Remove a class or attribute

To remove a class or attribute:

1. Right-click the instance you want to change, or find it in the right panel.
2. Click the X corresponding to the class name or attribute to remove it.