Shottr – Screenshot Annotation App For Macのページにて、スクリーンショット編集アプリのShottr 1.8が公開されていました。（有料）

New Features

Backdrop tool: add gradient backgrounds, shadows and rounded corners to your screenshots.

• Backdrop Tool
• Support for Raycast Extension and Alfred Workflow
• URL Schemes API: more info

Improvements

• Custom annotation colors
• More sizes for Text labels, Arrows, and other annotations
• Setting to hide the splash screen
• Better handling of thumbnails on top of the Fullscreen windows
• Numerous smaller improvements and fixes