Comparing a web page with a document is easier when both stay visible. In Windows 11, Snap arranges open windows without changing their files. Start with two windows; filling every corner is rarely helpful if the text becomes too narrow.
Make a two-column workspace
Open the two applications. In the first window, press Windows+Z or hover over its maximize button. Choose one half of a two-column layout, then choose the second application from Snap Assist. The available layouts depend on display size, so a small laptop need not show the same choices as a larger monitor.
For a direct keyboard route, activate the first window and press Windows+Left Arrow. Activate the other and use Windows+Right Arrow. These shortcuts position the active window; they do not move text or combine documents. Drag a shared boundary to adjust the working space where supported by the selected settings.
If the suggestions do not appear
Open Settings → System → Multitasking and expand Snap windows. Check the main toggle and the option that suggests other windows after snapping. If the maximize-button menu is missing in one app, try the keyboard shortcut or drag its title bar to an edge. An individual app’s window controls can differ.
Do not lower display resolution just to obtain a particular layout. First check whether two readable columns already solve the task. A narrow document can also need its own zoom adjustment.
Check the working result
Put a sample paragraph on one side and your notes on the other. Scroll each independently, switch away and return. Windows can group snapped windows so that taskbar previews offer the arrangement again. That convenience does not save unsaved documents or guarantee restoration after every restart.
Before closing, save each file in its own application. If a layout is distracting, restore or move the windows normally; turning off Snap is optional, not a required repair.