⚙️Annotation shapes

When creating a new object, a dialog window will appear. The buttons available depend on the type of object. When creating a Bounding Box, Oriented Bounding Box, or Cuboid, you can only undo the last action or cancel the creation entirely. In the Cuboid dialog window, you can also align the object to either the screen or image edges.

Bounding box creation

Oriented Bounding Box creation

When creating Polygon or Multiline you can undo the last action, cancel the creation entirely, or complete editing

Multiline creation

When creating Skeleton or Mesh you can also undo the last action, cancel the creation entirely, or complete editing . Creating an object you can see the name of current vertex, skip one, or choose another from the drop-down list.

Creating Skeleton

When creation Bitmap you can undo the last action, cancel the creation entirely, or complete editing . There are also several tools with which you can create an object. For more details on creating Bitmap go here.

Bitmap creation

When working with videos, there are specific buttons available only for video-related functions. For more information go to Video annotation section.

Video related functions

The following functions are common to all classes of objects:

Icon	Function	Description
	Delete the object completely (Backspace)	Deletes the annotation completely
	Bind (.)	Binds objects to each other, in the pattern Parent > Child
	Redraw (R)	Redraws the existing object
	Change the Stacking order	Changes the order in which objects are displayed if their annotation boundaries are overlapped: Bring to front; Send to back; Place in front of object; Place behind object A detailed application of the Stacking order can be found here
	Select	This tool is automatically activated when no other tool (like “Move” or “Edit”) is active. While the “Select” tool is active, no modifications are made to the selected object, and the left mouse button may be used to select objects in the editor. While other tools are active, objects may be selected using the shift key + left mouse button combination, or through the objects list.
	Edit ([)	Edits the selected object
	Change the type	Changes the type (class) of the annotated object

When annotating objects in a video file, it's important to start from the first frame of appearance. Even if the object has a better angle at the end of the file, interaction occurs from previous to next (unless otherwise specified in the project instructions).

Object selection

To select multiple objects, press and hold the left mouse button anywhere in the editor window and then drag the pointer to draw the selection frame. Every object completely contained in the selection frame will be selected.

Alternatively, you can click an object (both in the editor window and in objects list) with the left mouse button while holding down the Ctrl key to add it to the selection or, if already selected, to unselect it.

Finally, drawing the selection frame while holding down the Ctrl key will add all the objects that are completely contained in the frame to the current selection instead of replacing the current selection (if all objects contained in the frame are already selected, they will be removed from the selection instead).

Image rotation

It is possible to rotate the image in the editor, which may be useful for images that were taken by a tilted camera. To rotate image in the editor:

• Hold down the ctrl and alt keys, then click and hold the left mouse button on the point around which you want to rotate the viewport. A dotted circle will appear around the point you've clicked.

• Move the mouse pointer out of the circle. Now the circle becomes solid, and you can move the mouse pointer around it to rotate the image.

• The rotation will be restricted to 15 degrees increments while you're holding down the Ctrl key. Release the Ctrl key to rotate to an arbitrary angle.

Object annotation can be divided into classes:

• Bounding Box object annotation

• Multiline and Polygon object annotation

• Skeleton object annotation

• Bitmap object annotation

• Mesh object annotation

In addition to button usage, Shortcut keys are also available on the platform.