Free Ruler2.0.5

Features:
Horizontal and vertical rulers.
Choose from pixel, millimeter, and inch units (press U to cycle).
Float rulers above other applications (press F to toggle).
Move windows independently or as a group (press G to toggle).
Show or hide the shadow behind rulers (press S to toggle).
Align rulers at mouse location (press O for origin).
Reset ruler locations with Command-R.
Free Ruler V2.0.5更新日志：
- Optimized for Apple Silicon
- Added menu item and keyboard shortcut U for cycling through units
- Fixed issue with ruler scale changing when ruler is partially off-screen
- Improvements to ruler drawing code