Drag a window to an edge or corner of the screen to snap it into place (e.g., top-left corner for a quarter-screen size). Rectangle Pro provides visual guides to show where the window will land [1].
To make this guide more tailored to your needs, are you interested in: for specific workflows? Troubleshooting accessibility permissions on macOS? Learning the differences between the free version and Pro? Rectangle Pro 2.7.7
Repeatedly press a shortcut to cycle through different sizes (e.g., cycling between 12one-half 13one-third 23two-thirds of the screen). Pro Features (Vs. Free Version): Drag a window to an edge or corner