ReadingOverlayTool: A Swift macOS Reading Line Overlay for PDFs

I developed ReadingOverlayTool to make long PDF reading sessions on macOS easier and less fatiguing. Super useful for putting less strain on eyes while reading long papers in any room lighting conditions.

The app provides an always-on-top reading overlay that helps keep focus on the current line while dimming the rest of the page.

Core capabilities:

• Always-on-top reading line overlay.
• Adjustable divider by dragging in edit mode.
• Opacity and color controls from a lightweight control panel to rest eyes.
• Quick hide/unhide and edit-mode keyboard shortcuts.

GitHub repository: nimadarbandi/ReadingOverlayTool

Demo