Resolution too small to see on my new laptop

Nobody should be using an obsolete code editor, not with free ones available.

CS5 hasn't been updated since 2011.  So by web standards, you're using a decade-old antique that doesn't understand current code much less new equipment.

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-- Adobe Dreamweaver CC  - https://www.adobe.com/products/dreamweaver.html
-- Atom (free) - https://atom.io/
-- Codespaces (free, browser-based) - https://github.com/features/codespaces
-- Nova (Mac only, formerly called Coda) - https://nova.app/
-- Pinegrow - https://pinegrow.com/
-- Sublime Text - http://www.sublimetext.com/
-- Visual Studio Code (free) - https://code.visualstudio.com/
-- Wappler ~ Visual Web App Builder - https://wappler.io/

Change the display settings from your operating system. 

Drop back to a smaller resolution.

To add to @rayek.elfin's reply, CS5.5 was never made to cope with high resolution screens. Upgrade to a more modern IDE to take full advantage of the resolution.

See this article:

https://danantonielli.com/app-scaling-on-high-dpi-displays-fix-2019/