【實用遊戲app】BlackBoard!|最夯免費app-綠色工廠好玩App

* OVER 1 MILLION DOWNLOADS ++Welcome to BlackBoard! as the name implies, BlackBoard is a simple drawing app for iOS. *Features: - Tools such as pen, line, text, rectangle, ellipse, and eraser - Individual tool settings such as primary and secondary color, line width, transparency, and font size - Importing photos from the photo album - Multi-level undo and redo operations - Layers with individual levels of transparency - Sharing via mail, Twitter, camera roll and more. *The drawing functionality of BlackBoard! can also be used within your own applications with minimal effort.