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Use an iPad as a second display

With Sidecar, you can use your iPad as a display that extends or mirrors your Mac desktop.

Trackpad gestures

Slide two fingers to move the image.

Double-tap with two fingers for smart zoom.

Pinch with two fingers to zoom in/out.

Swipe left or right with three fingers to change the image.


System Preferences > Trackpad > More Gestures tab.

For "Swipe between pages", select "Swipe with two or three fingers" or "Swipe with three fingers".

For "Swipe between full-screen apps", select "Swipe left or right with four fingers".

Magic Mouse gestures

Slide a finger to move the image.

Double-tap with a finger for smart zoom.

Swipe left or right with two fingers to change the image.


System Preferences > Mouse > Point & Click tab > Smart zoom.

System Preferences > Mouse > More Gestures tab.

For "Swipe between pages", select "Swipe with two fingers".

Zoom in, Zoom out

Click a position to zoom in/out.

Pressing command + mouse wheel down/up, you can zoom in/out.

Zoom fit

Clear zoom.

Focus box

You can quick zoom to the selected box.

Quick zoom to the object

Hide buttons

Open, Create, etc. buttons are hidden and the image and labels table is shown largely.

Label cubic bezier curves, line segments, and points

Hide cross hairs

Hide cross hairs when creating box.

Hide other boxes

Hide other boxes except the selected box.

Hide keypoints names

Hide keypoints names.

Hide pixels

Toggle pixels alpha.

Hide superpixels

Toggle superpixels alpha.

Show small pixels

You can show small pixels areas which are less than 0.01 of the image size.

Video to image frames, augment images, etc.

Show other pixels

You can show other pixels objects.

Show boxes on keypoints

You can edit the bounding box for each keypoints object.

Show labels on boxes

Show labels on boxes.

Hiding other boxes, only selected boxes are shown.

Show coordinates on boxes

Show (x, y) coordinates on boxes.

Hiding other boxes, only selected boxes are shown.

Show indexes on points

Show each index for each point.

Show indexes on labels table

Show each row number on the labels table.

Show checkboxes on labels table

Show a checkbox for each row on the labels table.

It hides each label and makes viewing and selecting other labels easier.

Label pixels with brushes and superpixels

Show depth image

When the rgb image name is image_name.jpg, put the depth image as image_name_depth.png in the same folder.

Toggle depth image alpha.

Video to image frames, augment images, etc.

Reload the image

Reload the current image and annotation file.

Toggle entering gallery view.

Thumbnails are updated when you open folders or change the label format, and saved in the folder "~/Library/Containers/RectLabel/Data/thumbnails".

To remove thumbnails in the folder, close folder.

Enter full screen

Toggle entering full screen.