After sharing a capture from the Share menu, copy and paste, or dragging from the tray, the image size is too large.
By default Snagit 2020 will share images using the full (retina) size of that image. You can change this within the Snagit Preferences
- Select Snagit > Preferences > Advanced.
- Select Scale down retina images when sharing.
- Close window and share an image.